'Every substance in the world is made up of very fine particles.' Who said this first?
(A) Dalton
(B) Kanad
(C) Rutherford
(D) Avogadro
Oxygenation is a chemical reaction in which
(A) The electron is discarded.
(B) Oxygen is a combination.
(C) The ratio of the positive group increases.
(D) All of the above
Nowadays yellow lamps are being used in abundance in street lights. Which of the following gas are used in these lamps?
(A) Sodium
(B) Neon
(C) Hydrogen
(D) Nitrogen
A catalyst is a substance that_________ the velocity of a chemical reaction.
(A) Increases
(B) Decreases
(C) Changes
(D) None of these
The maximum number of electrons that can be accommodated in M shell is:
(A) 8
(B) 32
(C) 18
(D) 2
Which among the following noble gas has highest molar mass?
(A) Kr
(B) ne
(C) Ar
(D) Xe
What are the main components of Brass Alloy?
(A) Copper and Zinc
(B) Copper, Zinc and Nickel
(C) Copper and Strontium
(D) Copper and Nickel
Permanent hardness of water may be removed by the addition of
(A) sodium carbonate
(B) alum
(C) potassium permanganate
(D) lime
Which of the following is the most common kidney stone-forming compound?
(A) Calcium oxalate
(B) Magnesium oxide
(C) Sodium bicarbonate
(D) Magnesium citrate
If the pH value of a substance is lower than 7, it would be considered as–
(A) Neutral
(B) Base
(C) Acid
(D) Ion
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