datavorous/entrance-exam-dataset huggingface dataset:
Which one of the following statements about ecological succession is incorrect?

Options:
A A community that is in near equilibrium with the environment and that is called a climax community.
B The gradual and fairly predictable change in the species composition of a given area is called ecological succession.
C Primary succession takes place in those areas which somehow lost all the living organisms that existed there.
D At any time during primary or secondary succession, natural or human induced disturbances (fire, deforestation, etc.), can convert a particular seral stage of succession to an earlier stage.

The correct answer is:
Primary succession takes place in those areas which somehow lost all the living organisms that existed there.

Solution:
When one species occupy an area leading to declining or disappearance of other species; this changes in the composition of species in any given area is called ecological succession. When succession occurs in an area where no living organism ever existed; it is called Primary Succession and when it takes place in the area that has lost all living organisms that had existed there; it is called Secondary Succession. Newly created ponds, bare rock are examples of primary succession. Abandoned farmlands and burned forests are examples of secondary succession.

Topic: Biology, Ecosystem, NEET
Which one of the following statements about mycoplasma is wrong?

Options:
A they are pleomorphic
B they are sensitive to penicillin
C they cause diseases in plants
D they are also called PPLO.

The correct answer is:
they are sensitive to penicillin

Solution:
Characteristics of Mycoplasma:
(i) Cell wall is absent and plasma membrane forms the outer boundary of the cell.
(ii) Due to the absence of cell wall these organisms can change their shape and are pleomorphic and are inherently resistant to lactam antibiotics (e.g., penicillin).
(iii) Lack of nucleus and other membranebound organelles. Genetic material is a single DNA duplex and is naked. Ribosomes are $70 \mathrm{~S}$ type.
(iv) Shows Heterotrophic nutrition. (Saprophytes and parasitic). M. pneumoniae causes lung infections such as walking pneumonia.
(v) They are found in the pleural cavities of cattle suffering from pleuropneumonia. These organisms are often called PPLO (pleuropneumonia-like organisms).
Related Theory
In the treatment of mycoplasmal pneumonia, antimicrobials against $M$ pneumoniae are bacteriostatic, not bactericidal. Tetracycline and erythromycin compounds are very effective as they are protein synthesis inhibitors.

Topic: Biology, Biological Classification, NEET, NEET 2007
Which one of the following statements is correct about secondary succession?

Options:
A It begins on a bare rock.
B It occurs on a deforested site.
C It follows primary succession.
D It is similar to primary succession except that it has a relatively fast pace.

The correct answer is:
It occurs on a deforested site.

Solution:
Secondary succession refers to the regrowth of habitat in the area where a disruptive event has occurred and eliminated the existing, above-ground plant life of the natural habitat. So, it occurs on a deforested site.

Topic: Biology, Ecosystem, NEET
Which one of the following statements is correct?
Consider the function $\mathrm{f}(\mathrm{x})=|\mathrm{x}-1|+\mathrm{x}^{2}$, where $\mathrm{x} \in \mathbf{R}$.

Options:
A $\mathrm{f}(\mathrm{x})$ is increasing in $\left(-\infty, \frac{1}{2}\right)$ and decreasing in $\left(\frac{1}{2}, \infty\right)$
B $\mathrm{f}(\mathrm{x})$ is decreasing in $\left(-\infty, \frac{1}{2}\right)$ and increasing in $\left(\frac{1}{2}, \infty\right)$
C $\mathrm{f}(\mathrm{x})$ is increasing in $(-\infty, 1)$ and decreasing in $(1, \infty)$
D $\mathrm{f}(\mathrm{x})$ is decreasing in $(-\infty, 1)$ and increasing in $(1, \infty)$

The correct answer is:
$\mathrm{f}(\mathrm{x})$ is decreasing in $\left(-\infty, \frac{1}{2}\right)$ and increasing in $\left(\frac{1}{2}, \infty\right)$

Solution:
As we know,
$f(x)=x-1 \mid+x^{2} \quad \forall x \in R$
$f(x)=\left\{\begin{array}{ll}x-1+x^{2} & x \geq 1 \\ 1-x+x^{2} & x < 1\end{array}\right.$
$\Rightarrow f^{\prime}(x)=\left\{\begin{array}{ll}2 x+1 & ; x \geq 1 \\ 2 x-1 ; & x < 1\end{array}\right.$
$f(x)$ is in quadratic form (parabola). Hence $f(x)$ is
decreasing in $\left(-\infty, \frac{1}{2}\right)$ and increasing $\left(\frac{1}{2}, \infty\right)$.

Topic: Mathematics, Application of Derivatives, NDA, NDA 2016 (Phase 1)
Which one of the following statements is correct?
Consider the function $\mathrm{f}(\mathrm{x})=|\mathrm{x}-1|+\mathrm{x}^{2}$, where $\mathrm{x} \in \mathbf{R}$.

Options:
A $\mathrm{f}(\mathrm{x})$ has local minima at more than one point in $(-\infty, \infty)$
B $\mathrm{f}(\mathrm{x})$ has local maxima at more than one point in $(-\infty, \infty)$
C $\mathrm{f}(\mathrm{x})$ has local minimum at one point only in $(-\infty, \infty)$
D $\mathrm{f}(\mathrm{x})$ has neither maxima nor minima in $(-\infty, \infty)$

The correct answer is:
$\mathrm{f}(\mathrm{x})$ has local minimum at one point only in $(-\infty, \infty)$

Solution:
$f(x)$ has local minimum at one point only in $(-\infty, \infty$ $f^{\prime}(x)=\left\{\begin{array}{ll}2 x-1 & ; \quad x < 1 \\ 2 x+1 & ; \quad x \geq 1\end{array}\right.$
Clearly; for $(\mathrm{x}>1) ; \mathrm{f}^{\prime}(\mathrm{x})>0 \geq \&$ for $(\mathrm{x} < 1)$
$\mathrm{x}=\frac{1}{2}$ is the point of local minima

Topic: Mathematics, Application of Derivatives, NDA, NDA 2016 (Phase 1)
Which one of the following statements is correct?
Consider the function $\mathrm{f}(\mathrm{x})=|\mathrm{x}-1|+\mathrm{x}^{2}$, where $\mathrm{x} \in \mathbf{R}$.

Options:
A $\mathrm{f}(\mathrm{x})$ is continuous but not differentiable at $\mathrm{x}=0$
B $\mathrm{f}(\mathrm{x})$ is continuous but not differentiable at $\mathrm{x}=1$
C $\mathrm{f}(\mathrm{x})$ is differentiable at $\mathrm{x}=1$
D $\mathrm{f}(\mathrm{x})$ is not differentiable at $\mathrm{x}=0$ and $\mathrm{x}=1$

The correct answer is:
$\mathrm{f}(\mathrm{x})$ is continuous but not differentiable at $\mathrm{x}=1$

Solution:
$f(x)=x-1 \mid+x^{2} \quad \forall \quad x \in R$
$f_{1}(x)=x-1 \mid, f_{2}(x)=x^{2}$
$f_{1}(x)$ and $f_{2}(x)$ both are continuous. Hence $f(x)$ is continuous.
$f(x)$ in differentiable at $x=0$ $f_{1}(x)$ is not differentiable at $x=1$.
Hence $f(x)$ is continuous but not differentiable at $x=1$.

Topic: Mathematics, Continuity and Differentiability, NDA, NDA 2016 (Phase 1)
Which one of the following statements is correct for secondary succession?

Options:
A It begins on a bare rock
B It occurs on a deforested site
C It follows primary succession
D It is similar to primary succession except that it has a relatively fast pace

The correct answer is:
It occurs on a deforested site

Solution:
Secondary succession is one of the two types of ecological succession of a plants life. As opposed to the first, primary succession, secondary succession is a process started by an event (e.g. forest fire, harvesting, hurricane, etc.) that reduces an already established ecosystem (e.g. a forest or a wheat field) to a smaller population of species, and as such secondary succession occurs on preexisting soil whereas primary succession usually occurs in a place lacking soil.

Topic: Biology, Ecosystem, NEET
Which one of the following statements is correct in respect of the curve $4 \mathrm{y}-\mathrm{x}^{2}-8=0 ?$

Options:
A The curve is increasing in $(-4,4)$
B The curve is increasing in $(-4,0)$
C The curve is increasing in $(0,4)$
D The curve is decreasing in $(-4,4)$

The correct answer is:
The curve is increasing in $(0,4)$

Solution:
Given that $4 \mathrm{y}-\mathrm{x}^{2}-8=0$ $\Rightarrow \quad y=\frac{x^{2}+8}{4}$
Differentiating w.r.t. $\mathrm{x}$
$\frac{\mathrm{dy}}{\mathrm{dx}}=\frac{2 \mathrm{x}}{4}$
For increasing function
$\frac{\mathrm{dy}}{\mathrm{dx}}>0$
So, $\frac{2 x}{4}>0 \Rightarrow x>0$
Thus, the curve is increasing in $(0,4)$.

Topic: Mathematics, Application of Derivatives, NDA, NDA 2006 (Phase 2)
Which one of the following statements is correct in respect
of the function $\mathrm{f}(\mathrm{x})=\mathrm{x}^{3} \sin \mathrm{x} ?$

Options:
A It has local maximum at $\mathrm{x}=0$.
B It has local minimum at $\mathrm{x}=0$.
C It has neither maximumnor minimum at $\mathrm{x}=0$.
D It has maximum value 1 .

The correct answer is:
It has local minimum at $\mathrm{x}=0$.

Solution:
$f(x)=x^{3} \sin x$
$f^{\prime}(x)=3 x^{2} \sin x+x^{3} \cos x$
$f^{\prime}(x)=0$
$\Rightarrow 3 x^{2} \sin x+x^{3} \cos x=0$
$\Rightarrow x^{2}(3 \sin x+x \cos x)=0$
$\Rightarrow x=0,3 \sin x+x \cos x=0$
Put $x=0$ in $(1)$ $3 \sin x=0 \Rightarrow \sin x=0$
$f^{\prime \prime}(x)=6 x \sin x+3 x^{2} \cos x+3 x^{2} \cos x+x^{3}(-\sin x)$
$f^{\prime \prime}(0)=0$
So, $f(x)$ has min. at $x=0 .$

Topic: Mathematics, Application of Derivatives, NDA, NDA 2016 (Phase 2)
Which one of the following statements is correct? The system of linear equations, $2 x+3 y=4$ and $4 x+6 y=7$, has

Options:
A no solution
B a unique solution
C exactly 3 solutions
D an infinite number of solutions

The correct answer is:
no solution

Solution:
Slope of both the lines are same and intercepts are different. So, the given equations represent the two parallel lines. Hence the system of linear equations has no solution.

Topic: Mathematics, Determinants, NDA, NDA 2008 (Phase 1)
Which one of the following statements is not correct?

Options:
A The derivative of $f(x)$ at $x=a$ is the slope of the graph of $\mathrm{f}(\mathrm{x})$ at the point $[\mathrm{a}, \mathrm{f}(\mathrm{a})]$
B $\mathrm{f}(\mathrm{x})$ has a positive derivative at $\mathrm{x}=$ a means $\mathrm{f}(\mathrm{x})$ increases as $\mathrm{x}$ increases from 'a'
C The sum of two differentiable functions is differentiable
D If a function is continuous at a point, it is also differentiable at the same point. $\quad$

The correct answer is:
If a function is continuous at a point, it is also differentiable at the same point. $\quad$

Solution:
If a function is continuous at a point, it need not be differentiable at the same point. Example, $f(x)=|x|$ is continuous at $\mathrm{x}=0$ but $\mathrm{f}(\mathrm{x})$ is not differentiable at $\mathrm{x}=0$

Topic: Mathematics, Application of Derivatives, NDA, NDA 2006 (Phase 2)
Which one of the following statements is not correct?

Options:
A Vector product is commutative
B Vector product is not associative
C Vector product is distributive over addition
D Scalar product is commutative

The correct answer is:
Vector product is commutative

Solution:
Since vector product is not commutative. So, option
(a) is correct.

Topic: Mathematics, Vector Algebra, NDA, NDA 2007 (Phase 2)
Which one of the following statements is NOT correct?

Options:
A The amount of some toxic substances of industrial waste water increases in the organisms at successive trophic levels.
B The micro-organisms involved in biodegradation of organic matter in a sewage polluted water body consume a lot of oxygen causing the death of aquatic organisms.
C Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries.
D Water hyacinth grows abundantly in eutrophic water bodies and leads to an imbalance in the ecosystem dynamics of the water body.

The correct answer is:
Algal blooms caused by excess of organic matter in water improve water quality and promote fisheries.

Solution:
During eutrophication of a water-body, there is continuous addition of sewage, organic waste which increases the BOD and subsequently decreases the DO. The addition of inorganic nutrients, like phosphate, causes extensive growth of algae, called algal bloom. This depleted the water quality and kills fish.

Topic: Biology, Environmental Issues, NEET, NEET 2023 (All India)
Which one of the following statements is wrong with respect to RMS (restriction modification system) as the foundation of r-DNA technology?

Options:
A Restriction endonuclease identifies introduced foreign DNA and cuts it into pieces.
B Modification enzymes add a methyl group to one or two bases usually within the recoginition site of restriction endonuclease enzymes.
C Restriction endonuclease can cleave any palindromic sequence.
D Restriction enzymes restrict the propagation of foreign DNA of bacteriophages in the host bacterium.

The correct answer is:
Restriction endonuclease can cleave any palindromic sequence.

Solution:
Restriction endonucleases cleave internal phosphodiester bonds only after recognizing specific sequences in DNA which are usually 4-6 base pairs long, and often palindromic.

Topic: Biology, Biotechnology - Principles and Processes, NEET
Which one of the following structures is considered as a secondary lymphoid organ?

Options:
A Tonsil
B Payer's patches
C Appendix
D All of these

The correct answer is:
All of these

Solution:
The immune cells are synthesized and get matured in the primary lymphoid organs like thymus and bone marrow. After maturation, the lymphocytes migrate from primary lymphoid organs to secondary lymphoid organs like spleen, lymph nodes, tonsils, Payer's patches in small intestine and appendix.

Topic: Biology, Human Health and Diseases, NEET
Which one of the following values of $\mathrm{x}, \mathrm{y}$ satisfies the in equation $2 \mathrm{x}+3 \mathrm{y} \leq 6 ; \mathrm{x} \geq 0, \mathrm{y} \geq 0 ?$

Options:
A $x=0, y=3$
B $x=1, y=2$
C $x=1, y=1$
D $x=4, y=0$

The correct answer is:
$x=1, y=1$

Solution:
Therecan bemanyvalues of $x$ and $y$ for this in equation. In the given options only $x=1, y=1$ satisfy the given equation

Topic: Mathematics, Basic of Mathematics, NDA, NDA 2007 (Phase 1)
Which one of the following vectors is normal to the vector $\hat{\mathrm{i}}+\hat{\mathrm{j}}+\hat{\mathrm{k}} ?$

Options:
A $\quad \hat{\mathrm{i}}+\hat{\mathrm{j}}-\hat{\mathrm{k}}$
B $\hat{\mathrm{i}}-\hat{\mathrm{j}}+\hat{\mathrm{k}}$
C $\quad \hat{i}-\hat{j}-\hat{k}$
D None of the above

The correct answer is:
None of the above

Solution:
One vector will be normal to the other vector if their dot product will be zero. Since none option satisfies the condition of normality. Therefore option (d) is correct.

Topic: Mathematics, Vector Algebra, NDA, NDA 2013 (Phase 1)
Which one of the following vectors of magnitude $\sqrt{51}$ makes equal angles with three vectors
$$
\vec{a}=\frac{\hat{i}-2 \hat{j}+2 \hat{k}}{3}, \vec{b}=\frac{-4 \hat{i}-3 \hat{k}}{5} \text { and } \vec{c}=\hat{j} ?
$$

Options:
A $5 \hat{i}-\hat{j}-5 \hat{k}$
B $5 \hat{i}+\hat{j}+5 \hat{k}$
C $\quad-5 \hat{i}-\hat{j}+5 \hat{k}$
D $5 \hat{i}+5 \hat{j}-\hat{k}$

The correct answer is:
$5 \hat{i}-\hat{j}-5 \hat{k}$

Solution:
Let $\vec{p}=x \hat{i}+y \hat{j}+z \hat{k}$ is a vector of magnitude $\sqrt{51}$
$\therefore \sqrt{x^{2}+y^{2}+z^{2}}=\sqrt{51}$
$\Rightarrow \mathrm{x}^{2}+\mathrm{y}^{2}+\mathrm{z}^{2}=51$
Let $\vec{p}$ makes equal angle $\theta$ with and $\vec{a}, \vec{b}$ and $\vec{c}$.
$\therefore \quad \vec{p} \cdot \vec{a}=|\vec{p}| \cdot|\vec{a}| \cos \theta$
$\therefore \quad \cos \theta=\frac{\vec{p} \cdot \vec{a}}{|\vec{p}||\vec{a}|}$
Similarly, $\cos \theta=\frac{\vec{p} \cdot \vec{b}}{|\vec{p}||\vec{b}|}$
and $\cos \theta=\frac{\vec{p} \cdot \vec{c}}{|\vec{p}||\vec{c}|}$
$\therefore \frac{\vec{p} \cdot \vec{a}}{|\vec{p}||\vec{a}|}=\frac{\vec{p} \cdot \vec{b}}{|\vec{p}||\vec{b}|}=\frac{\vec{p} \cdot \vec{c}}{|\vec{p}||\vec{c}|}$
$\begin{aligned} \Rightarrow & \frac{\frac{1}{3}(x-2 y+2 z)}{\sqrt{x^{2}+y^{2}+z^{2}} \frac{1}{3} \sqrt{1+4+4}}=\frac{\frac{1}{5}(-4 x-3 z)}{\sqrt{x^{2}+y^{2}+z^{2}} \frac{1}{5} \sqrt{16+9}} \\ &=\frac{y}{\sqrt{x^{2}+y^{2}+z^{2}} \sqrt{1}} \\ \Rightarrow & \frac{x-2 y+2 z}{3 \sqrt{x^{2}+y^{2}+z^{2}}}=\frac{-4 x-3 z}{5 \sqrt{x^{2}+y^{2}+z^{2}}}=\frac{y}{\sqrt{x^{2}+y^{2}+z^{2}}} \\ \Rightarrow & \frac{x-2 y+2 z}{3}=\frac{-4 x-3 z}{5}=y \\ \therefore & 5(x-2 y+2 z)=-3(4 x+3 z)=15 y \\ \therefore & 5 x-10 y+10 z=15 y \text { and }-12 x-9 z=15 y \\ \Rightarrow & 5 x-25 y+10 z=0 \quad \text { and }-12 x-15 y-9 z=0 \\ \Rightarrow & x-5 y+2 z=0 \text { and } 4 x+5 y+3 z=0 \\ x-5 y+2 z=0 \\ & x x+5 y+3 z=0 \\ &\left|\begin{array}{ccc}x & y & z \\ 1 & -5 & 2 \\ 4 & 5 & 3\end{array}\right|=\frac{x}{-15-10}=\frac{y}{8-3}=\frac{z}{5+20} \\ & \frac{x}{-25}=\frac{y}{5}=\frac{z}{25} \end{aligned}$
$\frac{x}{-5}=\frac{y}{1}=\frac{z}{5}=k$
(let)
$\therefore \quad x=-5 k, y=k, z=5 k$
Now, $x^{2}+y^{2}+z^{2}=51$
$\therefore \quad(-5 \mathrm{k})^{2}+k^{2}+(5 k)^{2}=51$
$\Rightarrow 25 k^{2}+k^{2}+25 k^{2}=51$
$\Rightarrow 51 k^{2}=51$
$\therefore \quad k=\pm 1$
When $k=1$, then $x=-5, y=1, z=5$
and $\vec{p}=5 \hat{i}+\hat{j}+5 \hat{k}$
when $k=-1$, then $x=5, y=-1, z=-5$
and $\vec{p}=5 \hat{i}-\hat{j}-5 \hat{k}$

Topic: Mathematics, Vector Algebra, NDA, NDA 2009 (Phase 1)
Which one of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?

Options:
A $\mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_3$
B $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_3$
C $\mathrm{CH}_3 \mathrm{OH}$
D $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{OH}$

The correct answer is:
$\mathrm{CH}_3 \mathrm{OH}$

Solution:
The carbonyl compounds which contains the $\mathrm{CH}_3 \mathrm{CO}-$ or the $\mathrm{CH}_3 \mathrm{C}(\mathrm{H})$ $(\mathrm{OH})$-compounds undergo the iodoform reaction. Benzyl alcohol, Methanol, Diethyl ketone, acetic acid do not give iodoform test.
Caution
Compounds that give positive Iodoform Test are Acetaldehyde, Methyl Ketone, Ethanol, Secondary Alcohols that contain methyl groups in alpha position.

Topic: Chemistry, Aldehydes and Ketones, NEET, NEET 2004
Which one of these doesn't fall in the same group as the other three?

Options:
A Bone
B Cartilage
C Nerve fibers
D Blood

The correct answer is:
Nerve fibers

Solution:
The most abundant animal tissue is Connective tissue. These are of different types: Loose connective tissues which includes Areolar and Adipose tissue. Dense connective tissues which include Tendon and Cartilag. Specialised connective tissues which include Bone, cartilage, blood and lymph. Nerve fibres constitute the nervous system

Topic: Biology, Structural Organisation in Animals, NEET
Which part of ovary in mammals acts as an endocrine gland after ovulation?

Options:
A stroma
B germinal epithelium
C vitelline membrane
D Graafian follicle.

The correct answer is:
Graafian follicle.

Solution:
The release of eggs (at secondary oocyte stage) after rupturing of graafian follicle is called ovulation. After the ovulation, the granulosa cell as well as the stroma cells form theca interna rapidly multiply to fill the cavity of graafian follicle which becomes corpus luteum. If fertilization occurs, corpus luteum grows further and secrete hormone progesterone. If fertilization does not take place, corpus luteum regresses and forms a white body called corpus albicans.

Topic: Biology, Human Reproduction, NEET, NEET 2007
Which part of the ovule stores reserve food materials?

Options:
A Nucellus
B Integument
C Placenta
D Funicle

The correct answer is:
Nucellus

Solution:
Nucellus is a mass of cell enclosed within the integument and it has abundant food reserves.
Each ovule has one or more protective layer called integuments.
The ovule is a small structure attached to the placenta by means of a stalk called funicle.

Topic: Biology, Sexual Reproduction in Flowering Plants, NEET, NEET 2024 (Re-NEET)
Which pigment absorbs the red and far-red light?

Options:
A Cytochrome
B Phytochrome
C Carotenoids
D Chlorophyll

The correct answer is:
Phytochrome

Solution:
Phytochrome is a pigment that absorbs red light and far-red light. Phytochrome has a light absorbing or light detecting portion (the chromophore) attached to small protein. Phytochrome occurs in 2 forms, i.e., $\mathrm{P}_r$ and $\mathrm{P}_{f r}$ (i.e., red light and far-red light absorbing forms) and these 2 forms are interconvertible. Cytochromes are electron transferring proteins. They contain iron porphyrin or copper porphyrin as prosthetic groups. Chlorophyll is the fundamental green pigment of photosynthesis. It is localized on the chloroplasts. Carotenoids are lipid compounds and they are yellow, orange, purple etc. in colour.

Topic: Biology, Photosynthesis in Higher Plants, NEET, NEET 2002
Which product of the following reactions fails to give the carbylamine test ?

Options:
A Hoffmann bromide degradation
B Gabriel phthalimide synthesis
C Reduction of nitrites with LiAlH4
D Reduction of tertiary amides with LiAlH4

The correct answer is:
Reduction of tertiary amides with LiAlH4

Solution:
The secondary and tertiary amines do not exhibit carbylamine reactions. As tertiary amides are derived from secondary amines, reduction of tertiary amides with LiAlH4 fails to give the carbylamine test.

Topic: Chemistry, Amines, TS EAMCET, TS EAMCET 2018 (04 May Shift 1)
Which products are obtained from the reduction of carboxylic acids using lithium aluminium hydride?

Options:
A Aldehydes
B Primary alcohols
C Ketones
D Secondary alcohols

The correct answer is:
Primary alcohols

Solution:
Carboxylic acids are reduced to primary alcohols when treated with lithium aluminium hydride.

Topic: Chemistry, Aldehydes, Ketones and Carboxylic Acids, NEET
Which property of colloidal solution is independent of charge on the colloidal particles?

Options:
A Coagulation
B Electrophoresis
C Electro-osmosis
D Tyndall effect

The correct answer is:
Tyndall effect

Solution:
Tyndall effect is related to scattering of light by colloidal particles and not dependent on charge.

Topic: Chemistry, Surface Chemistry, NEET, NEET 2015 (Phase 1)
Which property of colloids is not dependent on the charge on colloidal particles?

Options:
A Electro-osmosis
B Coagulation
C Electrophoresis
D Tynadall effect

The correct answer is:
Tynadall effect

Solution:
Tyndall effect is an optical property which don’t depend upon charge on colloidal particles but depends on size of colloid particles. Rest other properties are charge dependent.

Topic: Chemistry, Surface Chemistry, NEET
Which property of colloids is not dependent on the charge on colloidal particles?

Options:
A Coagulation
B Electrophoresis
C Electro-osmosis
D Tyndall effect

The correct answer is:
Tyndall effect

Solution:
Tyndal effect is due to Scattering of light and not due to charge.

Tyndall effect is independent of charge on the colloidal particles. It is an optical property and depends on the size of the colloidal particles.

The Tyndall effect, also known as Tyndall scattering, is light scattering by particles in a colloid or particles in a fine suspension. However, electro-osmosis, coagulation, and electrophoresis depend on the charge on the colloidal particles. These are electrical properties.

Topic: Chemistry, Surface Chemistry, NEET, NEET 2014
Which property of colloids is not dependent on the charge on colloidal particles?

Options:
A Coagulation
B Electrophoresis
C Electro-osmosis
D Tyndall effect

The correct answer is:
Tyndall effect

Solution:
Tyndal effect is due to Scattering of light and not due to charge.

Topic: Chemistry, Surface Chemistry, NEET
Which protein structure is primarily affected during denaturation?

Options:
A Primary structure
B Secondary structure
C Tertiary structure
D Quaternary structure

The correct answer is:
Tertiary structure

Solution:
During denaturation, secondary and tertiary structures are primarily affected.

Topic: Chemistry, Biomolecules, NEET
Which reaction pathway becomes favourable for the dehydration of secondary and tertiary alcohols?

Options:
A SN1 pathway
B SN2 pathway
C E1 pathway
D E2 pathway

The correct answer is:
E1 pathway

Solution:
Dehydration of secondary and tertiary alcohols typically follows the E1 pathway due to the competition between elimination and substitution.

Topic: Chemistry, Alcohols Phenols and Ethers, NEET
Which reference electrode is used to measure the electrode potential of other electrodes?

Options:
A Standard Helium Electrode
B Standard Bromine Electrode
C Standard Oxygen Electrode
D Standard Hydrogen Electrode

The correct answer is:
Standard Hydrogen Electrode

Solution:
Correct Option is : (D)
Standard Hydrogen Electrode

Topic: Chemistry, Electrochemistry, NEET