List of practice Questions

The atomic masses of He and Ne are $4$ and $20$ a.m.u., respectively. The value of the de-Broglie wavelength of He gas at $-{73}^{\circ }C$ is "M" times that of the de-Broglie wavelength of $Ne$ at ${727}^{\circ }C.M$ is

The conductivity of $0.02\mathrm{N}$ solution of a cell of $\mathrm{KCl}$ at ${25}^{\circ }\mathrm{C}$ is $2.765\times {10}^{-3}S{\mathrm{cm}}^{-1}$. If the resistance of a cell containing this solution is $4\times {10}^3$ ohm, what will be the cell constant?

A particle moves in a circle of radius 20 cm. Its linear speed is given by v = 2t . where t is in s and v in m/s. Then

The resistance $R = \frac{V}{I}$ where $V = (100 \pm 5) V $ and $I = (10 \pm 0.2) A.$ The percentage error in R is

A continuous breeder is:

A collection of all the alleles of all the genes of acrop plant is called.

A child of blood group O cannot have parents of blood groups

Does our blood have proteases and nucleases?

A duplicated chromosome has how many chromatids ?

A cell cycle includes:

A dental disease characterised by mottling of teeth is due to the presence of certain chemical element in drinking water. Which of the following is that element?

A biological species has:

The effective atomic number of iron in $[Fe(CN)_6]^{3-}$ is

6-furfuryl amino purine, 2 ,4-dichlorophenoxy acetic acid and indole-3 acetic acid are examples respectively for

A cybrid is a hybrid carrying

0ne hormone helps in ripening of fruits while the other stimulates closure of stomata.- These are respectively

$- 1^{\circ} C$ to $13^{\circ} C$ annual variations in the intensity and duration of temperature and $50$ to $250\, cm$. annual variation in precipitation, account for the formation of a major biome as:

The percentage of nitrogen in urea is about

Elements with atomic number 35 belongs to

The Doppler effect is applicable for

Which pair will show common ion effect ?

Write shaded portion as fraction. Arrange them in ascending and descending order using correct sign ‘<’, ‘=’, ‘>’ between the fractions:

Simplify the expressions and find the value if x is equal to 2
(i) x + 7 + 4 (x – 5) (ii) 3 (x + 2) + 5x – 7 (iii) 6x + 5 (x – 2) (iv) 4(2x – 1) + 3x + 11

Express as km using decimals.
(a) 8 m
(b) 88 m
(c) 8888 m
(d) 70 km 5 m