List of practice Questions

A simple telescope consisting of an objective of focal length $60\, cm$ and a single eye lens of focal length $5\, cm$ is focussed on a distant object in such a way that parallel rays comes out from the eye lens. If the object subtends an angle $2^{\circ}$ at the objective, the angular width of the image is

A round uniform body of radius $R$, mass $M$ and moment of inertia $I$, rolls down (without slipping) an inclined plane making an angle $\theta$ with the horizontal. Then its acceleration

The number of moles of $ KMnO_{4} $ reduced by one mole of $KI$ in alkaline medium is

The Okazaki fragments in $DNA$ chain growth : -

Which of the following oxidation states are the most characteristics for lead and tin respectively?

Which of the following polymers is prepared by condensation polymerisation ?

Which one of the following is a chain growth polymer?

Which one of the following ions is the most stable in aqueous solution? (At. no. $Ti = 22, V = 23, Cr = 24, Mn = 25$ )

Which one of the following shows functional isomerism ?

Which one of the following statements about amino acids is not true?

Lead concentration in blood is considered alarming if it is

In the energy band diagram of a material shown below, the open circles and filled circles denote holes and electrons respectively. The material is

In chloroplasts, chlorophyll is present in the

If $NaCl$ is doped with $10^{-4}\, mol \, \% $ of $SrCl_2,$ the concentration of cation vacancies will be $(N_A = 6 . 0 2 3 \times 10^{23}\,mol^{-1})$

The helical structure of protein is stabilized by

Carbon, silicon and germanium atoms have four valence electrons each. Their valence and conduction bands are separated by energy band gaps represented by $\left(E_{g}\right)_{c},\left(E_{g}\right)_{S i}$ and $\left(E_{q}\right)_{ Ge }$ respectively. Which one of the following relationships is true in their case?

The standard emf of a galvanic cell involving cell reaction with $ n=2 $ is found to be $0.295\, V$ at $ 25{}^\circ C $ .The equilibrium constant of the reaction would be (Given: $ F=96500\,C\,mo{{l}^{-1}}; $ $ R=8.314\,J{{K}^{-1}}mo{{l}^{-1}} $ )

A sequence of how many nucleotides in messenger RNA makes a codon for an ammo acid?

$ {{H}_{2}}O $ is dipolar, whereas $ Be{{F}_{2}} $ is not. It is because

Number of chiral carbon atoms in $ {{\beta }-{D-(+)-}} $ glucose is

In a regular octahedral molecule, $ M{{X}_{6}} $ the number of $ X-M-X $ bonds at $ 180{}^\circ $ is

Chloropicrin is obtained by the reaction of

Aniline when diazotised in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be:

Which one of the following can be oxidized to the corresponding carbonyl compound?

The $ -OH $ group of an alcohol or the $ -COOH $ group of a carboxylic acid can be replaced by $ -Cl $ using