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During the manufacturing of soap, the stone powder and sodium silicate are added for

Is KCL an acid or a base?

Isobars differ in

Which method of separation is witnessed here?

Neon is used for making signboards because___.

Which of the following statement regarding soil is incorrect?

A mill where seeds are removed from cotton bolls and the cotton is pressed into bales is called

Match the following:

$$\begin{array}{cccc}\text{(i)}& \text{Can have variable composition of constituent elements}& \text{(A)}& \text{Compound}\\ \text{(ii)}& \text{\_\_\_ is new substance formed due to reaction of two constituent elements}& \text{(B)}& \text{Mixture}\\ \text{(iii)}& \text{Constituent elements can be separated easily}& \text{(C)}& \text{Element}\\ \text{(iv)}& \text{Can be separated only by chemical or electrochemical reactions}& & \\ \text{(v)}& \text{Composition is always fixed}& & \\ \text{(vi)}& \text{Shows properties of constituent elements}& & \end{array}$$
The correct pairs are:-

Which of the following is/are a component(s) required for propagation of fire?

When an acid reacts with a base, what happens to the temperature of the surrounding?

Which of the following acid is present in tamarind?

Ozone is present in large amounts in the ___of the atmosphere.

Which of these substances is/are present in sewage?

The electrical work done during the reaction at 298 K:
$2H{g}_{\left(l\right)}+C{l}_{2\left(g\right)}\to H{g}_{2}C{l}_{2\left(s\right)},isGiventhat{E}_{\frac{C{l}_2}{C{l}^{-}}}^{\circ }=1.36V;E_{\frac{H{g}_{2}C{l}_2}{Hg,C{l}^{-}}}^{\circ }=0.27V;P_{C{l}_2}=1atm,$

Why the taj mahal is yellow in colour

The important. characteristics of soil should be:

(1) it should hold more water

(2) it should hold less water

(3) it should have particles of uniform size

(4) it depends on what we want to use the soil for

Why do we cry during cutting an onion?

The technique of watering plants by making use of narrow tubes which deliver water directly at the base of the plant is called:

Rust is:

When a person is caught in flames, they are wrapped in a thick blanket so as to:

Identify the compound noun in the sentence.

The biggest bedroom in the house was as large as a hall.

Which of the following disease is not caused by contaminated water?

Which of the following is a homogenous mixture?

What do we understand by "water is the only universal Solvent?

Which type of reaction is hydrolysis of water?

Which of the following are examples of combination reaction?

(i) $CaO+O_2\to 2CaC{O}_3$

(ii) $CaC{O}_3\to CaO+C{O}_2$

(iii) $MgO+C{O}_2\to MgC{O}_3$

(iv) $Fe+S\to FeS$

(v) $2AgCl+sunlight\to 2Ag+C{l}_2$

(vi) $C{H}_4+2O_2\to C{O}_2+2H_{2}O$

(vii) $N{a}_{2}O+H_{2}O\to 2NaOH$

Which of the following is/are not a product of coal?

Question 1 (d)
Mark ‘T’ if the statement is true and ‘F’ if it is false.
(d) Rain is the ultimate source of water.

From where do root hairs carry out exchange of oxygen and carbon dioxide?

Most metals are electropositive in nature and can thus easily form:

Question 19

Fill the blanks in the following sentences
(a) Lemon juice and vinegar taste ___ because they contain ___
(b) Turmeric and litmus are ___acid-base indicators.
(c) Phenolphthalein gives___colour with lime water
(d) When an acidic solution is mixed with a basic solution, they___ each other forming a and water.

Give 2 example for which the chromatography technique can be use.

What is the difference between molecules and compounds?

What is tidal volume? what effect does it have during exercise?

Which of these has the least impact on air pollution?

Identify the compound noun in the sentence.

The football team did not reach in time for the match.

The vegetation that grows under the shade of the canopy is called:

Clarified water is then passed into aeration tanks, where it is agitated or sprayed. Air may also be bubbled through to increase oxygen levels in the water. Why is this step carried out in the wastewater treatment plants?

Soaps and detergents are two types of ___

Which of the following option is true for the given statements, if elements A and B both are non-metals?

A) Element A and element B both have the same valency.

B) Element A and element B both belong to the same group.

Rusting can be prevented by:

Pencil lead is made up of a non-metal called