Last Updated on October 20, 2024 by studentabc.xyz
Q:- What happens when dilute hydro chloric acid is added to iron fillings ? [HSLC’17]
(a) Hydrogen gas and iron chloride are produced.
(b) Chlorine gas and iron hydroxide are produced.
(c) No reaction takes place.
(d) Iron salt and water are produced.
Ans :- (a) Hydrogen gas and iron chloride are produced.
Q:- Which of the following compound is used in soda – acid fire extinguisher ? [HSLC’23]
(a) NaC1
(b) Na2CO3
(c) NaHCO3
(d) NH4C1
Ans:- (c) NaHCO3
Q:- Which of the following metals reacts vigorously with oxygen ? [HSLC’17]
(a) Na
(b) Fe
(c) Cu
(d) Ag
Ans :- (a) Na
Q:- A solution turns red litmus blue.
The pH of the solution is – [HSLC’16]
(a) 1
(b) 4
(c) 5
(d) 10
Ans :- (d) 10
Q:- An element reacts with oxygen to give a compound with a high melting point. This compound is also soluble in water. The element is likely to be [HSLC’22]
(a) calcium
(b) carbon
(c) silicon
(d) iron
Ans :- (a) calcium
Q:-An atom has electronic configuration 2,8,7 . To which of the following elements would it be chemically similar ? (atomic numbers are given in the parentheses) [HSLC-20 & 17]
(a) N (7)
(b) F (9)
(c) P (15)
(d) Ar (18)
Ans:- (b) F(9)
Q:- The enzyme contained by our saliva is called [HSLC’19]
(a) Amylase
(b) Lipase
(c) Trypsin
(d) Pepsin
Ans:- (a) Amylase
Q:- The energy currency for mos of the cellular processes is [HSLC’23]
(a) ADP
(b) AMP
(c) ATP
(d) CO2
Ans:- (c) ATP
Q:- Which of the following is a plant hormone ?
(a) Insulin
(b) Thyroxin
(c) Oestrogen
(d) Cytokinin
Ans :- (d) Cytokinin
Q:- Human originated in- [HSLC’17]
(a) Asia
(b) Africa
(c) Australia
(d) Europe
Ans:- (b) Africa
Q:- The focal length of a lens is 1 metre. Its power is – [HSLC’23]
(a) 0.5 D
(b) 1 D
(c) 1.5 D
(d) 2 D
Ans:- (b) 1 D
Q:- The change of focal length of an eye lens is caused by the action of the –
(a) Pupil
(b) Retina
(c) Ciliary muscles
(d) Iris
Ans :- (c) Ciliary muscles
Q:- Which one of the following is an example of non-conventional source of energy ? [HSLC’22]
(a) Fossil fuels
(b) Thermal power plants
(c) Hydro power plants
(d) Solar Energy
Ans :- (d) Solar Energy
Q:- The hormone which causes wilting of leaves is [HSLC’17]
(a) Auxin
(b) Gibberellin
(c) Abscisic acid
(d) Cytokinin
Ans:- (c) Abscisic acid
What To Know
- – An element reacts with oxygen to give a compound with a high melting point.
- – The focal length of a lens is 1 metre.
- – The change of focal length of an eye lens is caused by the action of the -.