List of practice Questions

Which of the following is known as fusion mixture?
Which one of the following gases contributes maximum to the 'green house effect' on the earth?
Which of the following compound does not react with metallic sodium ?
When $(NH_4)_2Cr_2O_7 $ is heated, the gas evolved is
'Lac operon' in E. coli, is induced by
In mitochondria, cristae act as sites for
The sides of a rectangle are 6.01 m and 12 m. Taking significant figures into account the area of rectangle is
A disease caused by eating fish contaminated by industrial waste, containing mercury compounds, is called
Approximately, the temperature corresponding to 1 eV energy, is
In a boiling water reactor, the boiling water is used as a
The neutron was discovered by
A particle revolves round a circular path. The acceleration of the particle is inversely proportional to
A pure semiconductor has a/an
With an increase in temperature, the electrical conductivity of intrinsic semiconductor
A bulb contains one mole of hydrogen mixed with one mole of oxygen at temperature $T$. The ratio of $r.m.s.$ values of velocity of hydrogen molecules to that of oxygen molecules, is
The number of electrons and neutrons of an element is $18$ and $20$ respectively. Its mass number is
The number of electrons in $\left[{ }_{19} K ^{40}\right]^{-1}$ is
Which of the following glasses is the most heat resistant?
The formation of 2-butene as a major product by dehydration of 2-butanol is in accordance with
Which of the following is an alum?
In Wolff-Kishner reduction, the carbonyl group of aldehydes and ketones is converted into
Which of the following is a transition elements ?
In the following four elements,the ionization potential of which one is the highest ?
The last member of the family of inert gases is
The structure of white phosphorus is