Formic acid is chemically known with the name of:
- (A) Butanoic acid
- (B) Ethanoic acid
- (C) Methanoic acid
- (D) Tartaric acid
- (C) Methanoic acid
Noble gases are also known with the name of:
- (A) Reverse gases
- (B) Active gases
- (C) Inert gases
- (D) Silent gases
- (C) Inert gases
Which of the following is a biotic component of ecosystem?
- (A) Water
- (B) Air
- (C) Fire
- (D) Plants
- (D) Plants
Which country invented tea first?
- (A) India
- (B) Sri Lanka
- (C) China
- (D) Kenya
- (C) China
Color of pigment in chloroplast is:
- (A) Blue
- (B) Orange
- (C) Green
- (D) Yellow
- (C) Green
Sublimation is a technique that helps chemists:
- (A) To break
- (B) To purify
- (C) To melt
- (D) To freeze
- (B) To purify
The smallest blood vessels in the body are:
- (A) Arteries
- (B) Veins
- (C) Capillaries
- (D) None of these
- (C) Capillaries
To hear a clear echo, the maximum distance (approximately) should be:
- (A) 10 meter
- (B) 16 meter
- (C) 20 meter
- (D) 25 meter
- (B) 16 meter
Sound travels the slowest in:
- (A) Water
- (B) Air / Gas
- (C) Steel
- (D) Copper
- (B) Air / Gas
Which of the following colors is a good reflector of heat?
- (A) Red
- (B) Blue
- (C) Black
- (D) White
- (D) White