Question 41 : The organic reaction represented by equation CH₃ - CH = O + H₂NOH gives CH₃ - CH - NH + H₂O is an example of
1. an addition reaction
2. a condensation reaction
3. an oxidation reaction
4. an elimination reaction
View Answer   Discuss with Members

Question 42 : The number of moles of solute present in 1 kg of a solvent is called its
1. molality
2. molarity
3. normality
4. formality
View Answer   Discuss with Members

Question 43 : The formula C₆H₅-CO-CH₃ represents
1. Acetone
2. Acetic acid
3. Acetophenone
4. Phenyl acetate
View Answer   Discuss with Members

Question 44 : The ionisation energy of hydrogen atom in the ground state is x KJ. The energy required for an electron to jump from 2^nd orbit to 3^rd orbit is
1. 5x/36
2. 5x
3. 7.2 x
4. x/6
View Answer   Discuss with Members

Question 45 : The molecule which has the highest percentage of ionic character among the following is
1. HI
2. HF
3. HCI
4. HBr
View Answer   Discuss with Members

Question 46 : The nucleus of a hydrogen atom consists of
1. 1 proton only
2. 1 proton + 2 neutron
3. 1 neutron only
4. 1 electron only
View Answer   Discuss with Members

Question 47 : The names of the scientists, Newlands, Mendeleev, and Meyer are associated with the development of
1. atomic structure
2. metallurgy
3. periodic table of contents
4. discovery of elements
View Answer   Discuss with Members

Question 48 : The inert gases are ____ in water
1. sparingly soluble
2. insoluble
3. soluble
4. None of these
View Answer   Discuss with Members

Question 49 : The metal that is usually extracted from sea water is
1. Ca
2. Na
3. K
4. Mg
View Answer   Discuss with Members

Question 50 : The number of g-molecule of oxygen in 6.02 x 10²⁴CO molecules is
1. 1 gram of molecule
2. 0.5 gram of molecule
3. 5 gram of molecule
4. 10 gram of molecule
View Answer   Discuss with Members