Q). Gram-molar volume is equal to
A) 20 liters
B) 2.24 liters
C) 22.4 liters
D) 112 liters
Q). In the reaction Na + H2O -> NaOH + H2 ↑, how many moles of Na_ and H2O react together to form NaOH and H2?
A) 2,2
B) 2,1
C) 1,1
D) 1,2
Q). Phenopthale in indicator gets pink colour in
A) HCl solution
B) NaOH solution
C) H2SO4 solution
D) CH3COOH solution
Q). HCl solution with Na2CO3 and NaHCO3 produces
A) H2 gas
B) NaH (Sodium hydride)
C) H2CO3
D) CO2 gas
Q). Milk of magnesia is
A) MgO
B) Mg(OH)2
C) MgCl2
D) Mg(HCO3)2
Q). Which of the following quantum numbers describes the orientation of orbital in space around the nucleus of atom?
A) Magnetic quantum number
B) Spin quantum number
C) Azimuthal quantum number
D) Principal quantum number
Q). The maximum number of electrons in n = 3 main energy level given as
A) 8
B) 16
C) 18
D) 32
Q). Modern periodic law states that the properties of elements are functions of their
A) atomic weights
B) atomic number
C) electronic configurations
D) Both atomic number and electronic configurations
Q). Which of the following is the p-block element?
A) Ti
B) Ce
C) Ga
D) K
Q). How many s-block elements and p-block elements are there in the third period of the periodic table?
A) 2,8
B) 8,2
C) 4,4
D) 2,6