List of practice Questions

Diamond and graphite are shown to be allotropic forms of carbon by the fact that

Diatomaceous earth is used for all except

Diazo coupling is useful to prepare

Detritus food chain in comparison to grazing food chain is

Development of an egg without fertilization is called

Derivative of $\sec^{-1} \left( \frac{1}{2x^2 + 1 } \right)$ w.r.t. $\sqrt{ 1 + 3x} $ at $x = - \frac{1}{3}$ is

Derivative of the function $f(x) = log_5(log_7x)$, $x > 7$ is

Derivative of the function $f(x) = 7x^{-3} $ is

$\Delta U^?$ of combustion of $CH_{4(g)}$ at certain temperature is $- 393 \,kJ\, mol^{-1}$. The value of $\Delta H^?$ is

Densities of two gases are in the ratio of 1 : 2 and their temperature are in the ratio of 2 : 1, then the ratio of their pressure is

Density of a gas is found to be $5.46 g/dm^3$ at $27 \,^{\circ}C$ and $2$ bar pressure. What will be its density at $STP$?

Deposition of calcareous shell around zygote occurs in

Dehydration of hydrates of halides of calcium, barium and strontium i.e., $CaCl_2 \cdot 6H_2O$, $BaCl_2 \cdot 2H_2O$, $SrCl_2 \cdot 6H_2O$, can be achieved by heating. These become wet on keeping in air. Which of the following statements is correct about these halides ?

Dehydration of the following in increasing order is

Delivery of developed fetus is scientifically called

$\Delta H$ for the reaction, $OF_2 + H_2O \to O_2 + 2HF$ $(B.E.$ of $O ?

$\Delta =\begin{vmatrix} sin^2x & cos^2x & 1 \\[0.3em] cos^2x &sin^2x & 1 \\[0.3em] -10 & 12& 2 \end{vmatrix}$

Dehydration of alcohols to ethers is catalysed by :

Decomposers like fungi and bacteria are (i) autotrophs (ii) heterotrophs (iii) saprotrophs (iv) chemo-autotrophs. Choose the correct answer.

Decompound leaves are

Decreasing order of boiling points among ethanol, butan-1-ol, butan-2-ol and methanol is

Dachigam Wildlife Sanctuary in Kashmir is associated with

Dark band of a sarcomere is anisotropic or doubly refractive because of the presence of

Dark reaction in photosynthesis is called so because

If $ lim_{ x \to 0 } [ 1 + x \, log \, (1 + b^2) ]^{\frac{1}{x}} = 2 b sin^2 \, \theta, b > 0 \, and \, \theta \in ( - \pi , \pi), $ then the value of $ \theta $ is