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Recent questions tagged cbsc

Alpha particles are .......nuclie that are doubly positively charged?

asked Aug 30, 2017 by meena.p

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Which one of the following is not included in the concept of four elements.

asked Aug 30, 2017 by meena.p

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Non-metals like to _ electrons to become __ ions.

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As compared to beryllium, magnesium is

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At constant pressure average kinetic energy of gas molecules increases 2 times if

asked Aug 30, 2017 by meena.p

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To prepare ammonia gas, gaseous mixture of

asked Aug 30, 2017 by meena.p

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Since atoms are neutral, the number of electrons is equal to the number of:

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In a sample of ethyl ethanoate $(CH_3COOC_2H_5 )$ the two oxygen atoms have the same number of electrons but different number of neutrons. Which of the following is the correct reason for it?

asked Aug 30, 2017 by meena.p

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Molten sodium chloride conducts electricity due to the presence of

asked Aug 30, 2017 by meena.p

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Out of 1 g of oxygen gas, 1 g of oxygen atoms and 1g of ozone , maximum number of atoms are present in:

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When a gold foil is bombarded by a beam of α particle, only a few of them get deflected whereas most go straight undeflected. This is because

asked Aug 30, 2017 by meena.p

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The sequence of steps for separating a mixture of salt, sand and camphor is:

asked Aug 30, 2017 by meena.p

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Wet clothes are kept for drying. Which of the following does not help them in drying:

asked Aug 30, 2017 by meena.p

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Angelo required an aqueous solution of sodium chloride. He made the solution by dissolving salt in:

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Elements whose oxidation number is increased are

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Which of the following is not a cell?

asked Aug 29, 2017 by priyanka.c

0 answers

The thread like structure present in the nucleus are

asked Aug 29, 2017 by priyanka.c

1 answer

Biotic components of an ecosystem will not include

asked Aug 29, 2017 by priyanka.c

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The term 'biodiversity' was coined by

asked Aug 29, 2017 by priyanka.c

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A group of similar organisms living together in a specific habitat is called

asked Aug 29, 2017 by priyanka.c

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A vaccine contains

asked Aug 29, 2017 by priyanka.c

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Condition that is not essential for growing maize is

asked Aug 29, 2017 by priyanka.c

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The method of irrigation in which water enters the filed through channels made between two rows of crops is

asked Aug 29, 2017 by priyanka.c

1 answer

Identify the secondary sexual characters in females

asked Aug 29, 2017 by priyanka.c

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Centrosomes are present only in

asked Aug 29, 2017 by priyanka.c

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Function of an ecosystem is/are

asked Aug 29, 2017 by priyanka.c

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Some bacteria like E.coli living in human intestine synthesis

asked Aug 29, 2017 by priyanka.c

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In boys, voice box protrudes out in the throat region and is called

asked Aug 29, 2017 by priyanka.c

1 answer

Frog are found to exhibit

asked Aug 29, 2017 by priyanka.c

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In human beings, the correct sequence of events during reproduction is

asked Aug 29, 2017 by priyanka.c

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Priya accidently placed her hand over a flame and immediately pulled it back. She felt the sensation of heat and reacted due to the action of

asked Aug 29, 2017 by priyanka.c

1 answer

The most important function of a cell membrane is that it

asked Aug 29, 2017 by priyanka.c

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Largest migration is exhibited by

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The variety of plants, animals and microbes found in a particular area is called

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The outer covering found in some microbes

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Microorganisms used in bread preparation

asked Aug 29, 2017 by priyanka.c

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Which of the following are harmful to crop plants?

asked Aug 29, 2017 by priyanka.c

1 answer

Conversion of ammonia into nitrate is called

asked Aug 29, 2017 by priyanka.c

1 answer

On contact with oxygen, Rubidium forms

asked Aug 29, 2017 by meena.p

1 answer

Which of the following is not matter

asked Aug 29, 2017 by meena.p

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a. Oxygen: diatomic b. Ozone :_______

asked Aug 29, 2017 by meena.p

1 answer

What is the formula for a gas at room temperature?

asked Aug 29, 2017 by meena.p

1 answer

In Rutherford's experiment, α particles were deflected because of

asked Aug 29, 2017 by meena.p

1 answer

The number of valence electrons determines:

asked Aug 29, 2017 by meena.p

1 answer

An element X has valency equal to 3. What will be its formula with carbonate ions?

asked Aug 29, 2017 by meena.p

1 answer

Fog is a solution of

asked Aug 29, 2017 by meena.p

1 answer

On industrial scale sodium metal is prepared by electrolysis of fused

asked Aug 29, 2017 by meena.p

1 answer

At constant pressure average kinetic energy of gas molecules increases 2 times if

asked Aug 29, 2017 by meena.p

1 answer

Shielding effect across period

asked Aug 29, 2017 by meena.p

1 answer

A student weighs $30\;kg$. Suppose his body is entirely made of electrons. How any electrons are there in his body? Mass of an electron$= 9.1 \times 10^{-31}\;kg$

asked Aug 29, 2017 by meena.p

1 answer

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