Recent questions tagged t10

The formula of ethanol is $C_2H_5 – OH$. What will be its molecular mass?

asked Sep 8, 2017 by meena.p

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The atomic number of sodium is 11 and its mass number is 23. It has

asked Sep 8, 2017 by meena.p

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Brass is a solution of molten copper in

asked Sep 8, 2017 by meena.p

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Which of the following compounds when dissolved in water gives coloured solution ?

asked Sep 7, 2017 by meena.p

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The number of electrons presents in $H^+$ is

asked Sep 7, 2017 by meena.p

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Choose the correct life cycle pattern for a mosquito

asked Aug 31, 2017 by priyanka.c

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A human sperm represents

asked Aug 31, 2017 by priyanka.c

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The total number of chromosomes in human beings is

asked Aug 31, 2017 by priyanka.c

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In girls, ovaries secrete during puberty

asked Aug 31, 2017 by priyanka.c

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Identify the correct statement

asked Aug 31, 2017 by priyanka.c

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Cheek cells do not have

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Internal fertilization takes place in

asked Aug 31, 2017 by priyanka.c

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The largest among various protected areas is a

asked Aug 31, 2017 by priyanka.c

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The first Red Data book of animals was published in the year

asked Aug 31, 2017 by priyanka.c

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The first antibiotic was prepared from a

asked Aug 31, 2017 by priyanka.c

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Which group of organisms comprise only pathogenic members?

asked Aug 31, 2017 by priyanka.c

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Atmosphere comprises of 78%

asked Aug 31, 2017 by priyanka.c

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The process of separation of grains from chaff is

asked Aug 31, 2017 by priyanka.c

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Propagation of ginger is generally done using

asked Aug 31, 2017 by priyanka.c

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The first cloned sheep was called

asked Aug 30, 2017 by priyanka.c

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Nitrous oxide, commonly called laughing gas, has been a matter of concern to environmentalists recently because

asked Aug 29, 2017 by meena.p

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The word atom is from a Greek word meaning:

asked Aug 29, 2017 by meena.p

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Which of the following alloys is used for making magnets ?

asked Aug 29, 2017 by meena.p

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Polythene and PVC are examples of

asked Aug 29, 2017 by meena.p

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When electric current is passed through a conducting solution, there is a change of colour of the solution. This indicates

asked Aug 29, 2017 by meena.p

2 answers

Trees help in reducing the pollution of our environment. Lakhs of trees are planted by people in the month of July every year. The occasion is called

asked Aug 29, 2017 by meena.p

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Choose the correct statement about inflammable substances from the following. They have:

asked Aug 29, 2017 by meena.p

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Which non metal is essential for our life and inhale during breathing?

asked Aug 29, 2017 by meena.p

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The fibres manufacture by petrochemicals are

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Smog =

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Carbon monoxide in vehicle exhaust causes

asked Aug 29, 2017 by meena.p

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The presence of which of the following salts in water causes corrosion in steam boilers ?

asked Aug 29, 2017 by meena.p

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During electrolysis of water, oxygen gas is deposited at which electrode?

asked Aug 29, 2017 by meena.p

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Generally metallic oxides are basic and non-metallic oxides are acidic in nature. Solution of which of the following oxides in water will change the colour of blue litmus to red?

asked Aug 29, 2017 by meena.p

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Which of the following groups contain all synthetic substances?

asked Aug 29, 2017 by meena.p

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A separation technique which uses a fractionating column to separate different liquid components in a mixture with different boiling points by heating mixture is called

asked Aug 18, 2017 by meena.p

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How many colours the sunlight spectrum has?

asked Aug 18, 2017 by meena.p

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Which of the following has an organic origin?

asked Aug 18, 2017 by meena.p

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Which of the following is necessary for burning (combustion)?

asked Aug 18, 2017 by meena.p

2 answers

The three states of matter are solid, liquid and gas.

asked Aug 18, 2017 by meena.p

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Metal pots are often made shiny on surface outside especially on the top and side and that makes sense thermally because this ___ .

asked Aug 18, 2017 by meena.p

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Movement of electrons in fixed orbits around nucleus was given by

asked Aug 18, 2017 by meena.p

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Carbon, hydrogen and oxygen combines together to make

asked Aug 18, 2017 by meena.p

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At end of a reaction, catalyst

asked Aug 18, 2017 by meena.p

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‘Bar’ is the unit of ?

asked Aug 17, 2017 by meena.p

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Which among the following is a positively charged particle emitted by a radioactive element?

asked Aug 17, 2017 by meena.p

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Which gas evolves when charcoal is burnt?

asked Aug 17, 2017 by meena.p

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The Earth is surrounded by an insulating blanket of gases which protects it from the light and heat of the Sun. This insulating layer is called the

asked Aug 17, 2017 by meena.p

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Glass is made of the mixture of

asked Aug 17, 2017 by meena.p

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When liquids are heated, they

asked Aug 17, 2017 by meena.p

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