One of three p-orbitals on nitrogen atom overlaps with pi bonding system in ‘benzene ring’ in the molecule of.
A. Phenylamine
B. Ethylamine
C. Propylamine
D. Methylamine
The increase in the rate of reaction due to the increase in temperature is due to
A. Increased energy only
B. Successful collision only
C. Elastic collisions
D. Increased energy and successful collisions
Sodium carbonate is produced by
A. Haber process
B. Ammonia Solvay process
C. Decons process
D. Lead chamber process
Covalent network crystals have
A. Higher melting point then molecular crystals
B. Lower melting point then molecular crystals
C. Discrete molecules linked by Van der waals forces
D. Hydrogen bonding
What is a mixture of Potassium Nitrate Powdered Charcoal and Sulphur called?
A. Paint
B. Glass
C. Gun Powder
D. Cement
Which of the following food sources has the highest levels of vitamin C?
A. Parsley
B. Broccoli
C. Black currants
D. Orange juice
Which of the following vitamin helps in blood clotting?
A. Vitamin A
B. Vitamin C
C. Vitamin D
D. Vitamin K
One of the following is not a criterion for an element to be termed as “essential”
A. The element is not required for growth and development
B. The function of a particular element cannot be replaced with another
C. The element should be used in plant metabolism
D. None of the above