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How will you separate camphor, common salt and iron nails from their mixture?

What causes the violence associated with torrential rain?

A solution containing 30 grams of sugar dissolved in 370 grams of water. Calculate the concentration of the solution.

What do the following abbreviations stand for?

(i) $O$

(ii) $2O$

(iii) $O_2$

(iv) $3O_2$

Does the effect of pressure change objects from one state to the other? Or it only changes gases into liquids?

What is Brownian motion? Describe briefly.

Statements:

All cakes are bags.

All lamps are bags.

Conclusions:

Some lamps are cakes.

No lamp is cake.

If 1g Si contains 'n' atoms. Then calculate the number of atoms in 0.8g of calcium, with respect to 'n'. (Si=29, Ca=40).

Which technique can be used to detect and identify traces of poison present in the stomach wash of a person ?

How will you separate a mixture of common salt, sulphur powder and sand?

Can electrons be arranged in the L shell without filling electrons in k shell .why?

State the main sources and effects of carbon monoxide.

Which of the given chemical formula is not possible for the elements given below along with their valency.

Element P - 1

Element Q - 2

Element R - 1

Element S - 4

A solution in which no more solute can be dissolved at a given temperature is known as:

Explain why, diffusion occurs more quickly in a gas than a liquid.

When ${Fe}^{2+}$ ion changes to ${Fe}^{3+}$ ion we are witnessing ___

Why should curd and sour substances not be kept in brass and copper vessels?Why should water be never added dropwise to concentrated sulphuric acid? [3 MARKS]

Percentage compositionn of hydrogen in benzene is _____

There is an element X with atomic number 16. A student was assigned a task to write down the features of the group to which this element belongs to. Help him to find out the group number of the element X so that he can complete his task.

Incomplete burning of fuel produces __ (Carbon dioxide/Carbon monoxide) which is a Poisonous gas.

“Soil is formed by water.” Justify.

An atom X has three electrons more than the noble gas configuration. What type of ion will it form ? Write the formula of its (i) sulphate (ii) nitrate (iii) phosphate (iv) carbonate (v) hydroxide.

Ammonium chloride and salt is separated by the process of ___. The volatile component in this case is___.

of a polymer containing 30% molecules with molecular mass 20,000, 40% have 30,000 and the rest have 60,000 is

It is because of the inability of $n{s}^2$ electrons of the valence shell to participate in bonding that

Hi,

what is the equation to change the temperature of kelvin to celcius and vice versa?

The correct functional group X and the reagent/reaction conditions Y in the following scheme are


(IIT-JEE, 2011)

During filtration, the solid that remains on the filter paper is called:

What is the electronic arrangement of is ${}_9{F}^{17}$ ?

The reaction, $3Cl{O}^{-}\left(aq\right)⟶Cl{O}_3^{-}\left(aq\right)+2C{l}^{-}\left(aq\right)$ is an example of:

Complete the following equation :

$4N{O}_2+2H_{2}O+O_2\to$?

How will you separate water from mustard oil?

Which of the following statements is wrong?

Which of the following statement is true?

Give two reasons for supposing that water is a compound and not a mixture.