Chemistry Questions Answers MCQ for various exams like SSC CGL, CPO, CHSL, High Court and other related exams.
- Pasteurisation of milk means heating it
A) above 72°C
B) above 62°C
C) about 72°C
D) about 62°C
- Chemically quick silver is called
A) mercury
B) silver
C) gold
D) copper
- The major component in LPG is
A) methane
B) butane
C) ethane
D) propane
- Oxygen has (+) oxidation number only in
A) OF2
B) H2O
C) N2O
D) Cl2O
- Natural rubber is a polymer of
A) butadiene
B) styrene
C) ethylene
D) isoprene
- Ozone layer is present in
A) troposphere
B) stratosphere
C) exosphere
D) ionosphere
- Which of the following metal is non toxic
A) chromium
B) cobalt
C) gold
D) cadmium
- The most important ore of iron is
A) galena
B) magnetite
C) pyrolusite
D) siderite
- The most reactive among the halogens is
A) fluorine
B) chlorine
C) bromine
D) iodine
- Taj Mahal is greatly affected due to
A) tourists
B) acid rain
C) deforestation
D) sound pollution
- Seaweeds are important source of
A) fluorine
B) chlorine
C) bromine
D) iodine
- Bromine is a
A) solid metal
B) liquid metal
C) solid non metal
D) liquid non metal
- Which of the following is used as a food preservative?
A) picric acid
B) glycerine
C) sodium benzoate
D) sodium chloride
- Chemical name for bleaching powder is
A) calcium chlorate
B) calcium hypochlorite
C) calcium chloro hypochlorite
D) calcium bichloride
- The chief source of naphthalene is
A) coal-tar
B) diesel
C) charcoal
D) camphor
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