When alcohol reacts with phosphorous halides it geive____________________?
(A) alkyl halides
(B) alkyl amine
(C) alkanes
(D) alkynes
An alcohol which can be prepared by fermentation is_________________?
(A) CH3OH
(B) C3H7OH
(C) CH3 – CH2 – OH
(D) C6H5OH
The discovery of neutron became very late because _______ ?
(A) It does not carry any charge
(B) It does not move
(C) It is a fundamental particle
(D) It is present in nucleus
The absolute value of charge on electron was determined by ________ ?
(A) J.J.Thomson
(B) Chadwick
(C) Rutherford
(D) Robert Millikan
What is the molecular weight of Ammonia (NH3) ________ ?
(A) 17.031 g/mol
(B) 18.031 g/mol
(C) 19.031 g/mol
(D) 27.033 g/mol
Sum of protons and neutrons in an atom gives off _________ ?
(A) Nucleon numbera
(B) Mass number
(C) Atomic number
(D) Both A and B
Which among the following is not a property of Ionic bond _________?
(A) Sharing of electrons
(B) Transfer of electrons
(C) Losing of electrons
(D) Gain of electrons
Permanent hardness of water due to sulphate of metals can be destroyed by the use of ________ ?
(A) Zeolites
(B) Sulphonides
(C) Lime
(D) Nitrates
What is the Chemical formula of Zinc Hydroxide _________ ?
(A) Zn(OH)2
(B) ZNO2
(C) Zn2(OH)3
(D) ZnOH