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Recent questions tagged class 7
Questions
Production of chlorofluorocarbons (CFC) gas which is proposed to be banned in India, is used in which of the following domestic products?
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
1
answer
A substance which cannot be broken in to simpler substances further by any chemical reaction is called
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
1
answer
If both water and carbon dioxide is given to plant still it will not prepare its own food if there is lack of
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
1
answer
Atomic number of sodium is 11 and its atomic mass is 23, so number of protons and neutrons in an atom of sodium is
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
1
answer
Smallest particle of Carbon dioxide consists of
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
1
answer
Which of the following is the best heat insulator
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
1
answer
The filament of an electric bulb is made of
cbsc
class 7
olympiad
science
chemistry
t8
asked
Aug 16, 2017
by
meena.p
0
answers
More accurate and quick measure of pH value is done by
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Nitrogen helps in making of nitrogen based
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Shreya made a cup of hot tea and put a metal spoon in the cup so that the tea would cool down faster. Which of the following statements best describes the cooling of tea faster?
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
In an atomic nucleus, neutrons and protons are held together by
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Sodium metal is kept under
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
What is condensation?
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Which of the following is the best conductor of electricity ?
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Which of the following gases is lighter than air ?
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Parmanent hardness of water may be removed by the addition of —
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Cats eat rats. Rats eat grain. When grain is plentiful, what do you expect to happen?
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Catalytic properties of a substance may be best defined as a phenomenon of ?
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Large molecules such as polythene and polystyrene contains
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
Two students of Class VI have performed the same experiment 'Separation of Sugar' by different methods as shown below: Which of the following statements are correct? <br> I. Method I is faster than method 2. <br> II. Method 2 leads to the decomposition of sugar to carbon. <br> III. Method 2 is more appropriate than method I. <br> IV Method 2 is slow but pure sugar is obtamed without getting decomposed.
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
1
answer
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
0
answers
Potassium nitrate is used in
cbsc
class 7
olympiad
science
chemistry
t7
asked
Aug 16, 2017
by
meena.p
0
answers
Among the various allotropes of carbon,
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Modern model of atom shows that electrons are outside nucleus in region of high
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Match column I with column 11 and select the correct option from the codes given below. Column - I Column - II (a) Clothing material (i) Nylon (b) Twisted fibre (ii) Fabric (c) Synthetic fibre (iii)Yarn (d) Animal fibre (iv) Cotton (e) Plant fibre (v) Silk
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Reema's mother has done some preparations for her Birthday Party. Which of the folllowing changes can be reversed
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Lactic acid is found in
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
In an atomic explosion, enormous energy is released which is due to
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Water is neither acidic nor alkaline because
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Compared to ionic compounds, covalent bonds have
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
What is laughing gas?
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Two main requirements to make ammonia are
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Hypothesis that matter has a continuous composition which can always be broken down into smaller and smaller pieces was given by
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Which of the following are the ingredients of gun metal?
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Which of the following are true regarding a catalyst? <br> 1. It is a substance which increases the rate of reaction. <br> 2. It is a substance which reduces the activation energy. <br> 3. It is a substance which increases the activation energy. <br> 4. It is a substance which is consumed in the reaction.
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
If baking soda or fruit salt is mixed with vinegar there takes place a
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
2
answers
Fog would most likely occur when
cbsc
class 7
olympiad
science
chemistry
t6
asked
Aug 14, 2017
by
meena.p
1
answer
Sodium becomes a cation because
cbsc
class 7
olympiad
science
chemistry
t5
asked
Aug 14, 2017
by
meena.p
1
answer
Stars are made up of two most abundant elements in universe namely
cbsc
class 7
olympiad
science
chemistry
t5
asked
Aug 14, 2017
by
meena.p
1
answer
Permanent hardness of water may be removed by the addition of
cbsc
class 7
olympiad
science
chemistry
t5
asked
Aug 14, 2017
by
meena.p
1
answer
The inert gas which is substituted for nitrogen in the air used by deep sea divers for breathing, is
cbsc
class 7
olympiad
science
chemistry
t5
asked
Aug 14, 2017
by
meena.p
1
answer
The average salinity of sea water is
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
In an atomic explosion, enormous energy is released which is due to
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
0
answers
Which of the following is a protein?
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
The solution which do not change the colour of either red/blue litmus are known as
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
If 1g of hydrogen is mixed with 8 g of oxygen they water produced will be
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
A gas which is used as cooling agent is
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
2
answers
Non stick cooking utensils are coated with
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
The chemical (ethyl mercaptan) added to the otherwise odourless LPG cooking gas for imparting a detectable smell to the gas is a compound of
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
When an iron nail gets rusted, iron oxide is formed
cbsc
class 7
olympiad
science
chemistry
t4
asked
Aug 11, 2017
by
meena.p
1
answer
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