9th Chemistry Newbook Chapter1 | MCQs
9th Chemistry Newbook Chapter1 MCQs solution.
Tick the correct answer.
(i) Matter is present in neon signs in the state of:
(a) Supercritical fluid
(b) Plasma
(c) Gas
(d) liquid crystal
Correct option is (b)
Matter is present in neon signs in the state of Plasma
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(ii) Hazardous effects of shopping bags are studied in:
(a) Geochemistry
(b) Inorganic Chemistry
(c) Analytical Chemistry
(d) Environment Chemistry
Correct option is (d)
Hazardous effects of shopping bags are studied in Environment Chemistry
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(iii) The man-made polymer is:
(a) Starch
(b) Polystyrene
(c) Protein
(d) Cellulose
Correct option is (b)
The man-made polymer is Polystyrene
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(iv) The crystal of which substance has rhombic shape?
(a) Brass
(b) Sulphur
(c) Graphite
(d) Bronze
Correct option is (b)
The crystal of Sulphur has rhombic shape
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(v) Which liquid among the following is a colloidal solution?
(a) Milk
(b) Slaked lime used for white wash
(c) Vinegar solution
(d) Mixture of AgCl in water
Correct option is (a)
Milk is a colloidal solution
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(vi) Which of the following is a heterogeneous mixture?
(a) A solution of calcium hydroxide in water
(b) A solution of potassium nitrate in water
(c) Hot chocolate
(d) Concrete mixture
Correct option is (d)
Concrete mixture is a heterogeneous mixture
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(vii) A state of matter whose properties are between those of liquid and crystalline solids:
(a) liquid crystal
(b) Supercritical fluid
(c) Plasma
(d) Dark matter
Correct option is (a)
A state of matter whose properties are between those of liquid and crystalline solids is called liquid crystal
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(viii) When the tiny visible particles of a substance are dispersed through a medium, the mixture is named as:
(a) True solution
(b) Colloid
(c) Suspension
(d) Saturated solution
Correct option is (c)
When the tiny visible particles of a substance are dispersed through a medium, the mixture is named as suspension
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(ix) A solution of Potassium Chlorate has a solubility of about 13.2g per 100 centimetre cube at 40°C. How its solubility will be affected, if you decrease the temperature?
(a) The solubility will increase
(b) The solubility will decrease
(c) The solubility will remain the same
(d) The solubility will first increase with temperature and then it will decrease
Correct option is (b)
A solution of Potassium Chlorate has a solubility of about 13.2g per 100 centimetre cube at 40°C and its solubility will first increase with temperature and then it will decrease
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(x) You are studying the rate of hydrolysis of starch under different conditions of temperature. In which branch of chemistry this topic will fall?
(a) Organic Chemistry
(b) Analytical Chemistry
(c) Biochemistry
(d) Physical Chemistry
Correct option is (d)
In Physical Chemistry we study the rate of hydrolysis of starch under different conditions of temperature.
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