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Recent questions tagged science
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Metals generally react with dilute acids to produce hydrogen gas. Which one of the following metals does not react with dilute hydrochloric acid?
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
1
answer
The most suitable material for the preparation of handles of cooking utensils is
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
1
answer
Polycot is obtained by mixing
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
2
answers
On burning metals react with oxygen to produce-
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
1
answer
Petrol can be saved by
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
1
answer
At room temperature, most elements are in which phase of matter?
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
1
answer
If a metal can be drawn into wires relatively easily it is called:
cbsc
class 8
olympiad
science
chemistry
t9
asked
Aug 28, 2017
by
meena.p
1
answer
A type of plastic that is biodegradable has been in the news lately. The ingredient that makes it biodegradable is:
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
What is the name for steel alloyed with chromium?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
The sulphuric acid turns blue litmus paper into-
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Which of the following will work best as a tester for electric current?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Which of the following is natural resources?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
What is called black gold?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Carbon monoxide in vehicle exhaust causes
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
A Pond contains clean water. Which of the following activities will produce least pollution of water?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
CNG is the abbreviated form of
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Which of the following is Non-biodegradable
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
The substance that does not burn with flame is
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Which gas is obtained during the processing of coal?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Which of the following metals reacts vigorously with water?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Thermoplastic is used for making which of the following?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Which of the following is used as a material for making protective windows in space probes ?
cbsc
class 8
olympiad
science
chemistry
t8
asked
Aug 28, 2017
by
meena.p
1
answer
Moist air is the combination of-
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Which of the following is not a common property of plastics
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
PCRA stands for
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Sodium metal is stored in
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
The coating on modern non- stick cookware and electric iron is of
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Petroleum was formed from organisms
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
In combustion
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
The presence of which of the following salts in water causes corrosion in steam boilers ?
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Which substance is formed by the carbonation of dead vegetation?
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Natural gas can be transported through
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Which one of the following is in crackers?
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
Which gas; obtained from natural gas; is used for manufacturing urea?
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 28, 2017
by
meena.p
1
answer
When oil or petrol catches fire, water is not used to extinguish it because
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 26, 2017
by
meena.p
1
answer
Greenhouse gases includes
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 25, 2017
by
meena.p
1
answer
Which of the following is basis of the modern periodic table ?
cbsc
class 8
olympiad
science
chemistry
t7
asked
Aug 25, 2017
by
meena.p
1
answer
Rust is —
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
The layer containing petroleum oil & gas is
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Which one of the following is used for decorating sweets?
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Potable water is the water which is
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
The substance that does not burn with flame is
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
The HVJ pipeline starts from which state?
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
The outermost zone of flame is of which colour?
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Chemical effect of electric current is primarily used for which of the following?
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Which material is used for making bottles and jars?
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Which one of the following is applied on wounds as an antiseptic?
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Which gas are produced when metal react with acids
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Naphthalene balls are obtained from
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
Marble cancer is caused by
cbsc
class 8
olympiad
science
chemistry
t6
asked
Aug 23, 2017
by
meena.p
1
answer
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