A. visible radiation
B. Ultra violet radiation
C. Infrared radiation
D. Gamma rays
A. Face centered cubic lattice
B. body centered cubic lattice
C. simple cubic lattice
D. othorhombic lattice
A. Heating sod. Salt of Benzoic acid with soda lime
B. Distilling phenol with Zn dust
C. Chlorobenzene with NaOH at 360°C & 150atm.
D. Hydrolysis of benzene sulphonic acid with super heated steam
A. Attractive forces
B. Repulsive force
C. Electrons
D. Neutrons
A. 3 bond pair one lone pair
B. 2 bond pair 2 lone pair
C. 1 bond pair 3 lone pair
D. 3 lone pair 1 bond pair
Which of the following is a substance?
A. Sea water
B. Brass
C. Tape water
D. Graphite
E. Sand
In chemistry, a substance refers to a matter which has specific composition and specific properties which do not change. A substance can be an element or a compound. A substance typically has a constant composition, which can not be separated by physical methods. Seawater and sand are not substances, because they have varied compositions and their components can be separated by physical methods.
A. Francium
B. Caesium
C. Rubidium
D. Radium