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Name the process by which plant material (or vegetation) buried deep under the earth was slowly converted into coal.

The following data pertains to reaction between A and B :
$\begin{array}{cccc}S.NO.& \left[A\right]mol{L}^{-1}& mol{L}^{-1}& Rate\left(mol{L}^{-1}tim{e}^{-1}\right)\\ 1& 1.0\times {10}^{-2}& 2.0\times {10}^{-2}& 2.0\times {10}^4\\ 2& 2.0\times {10}^{-2}& 2.0\times {10}^{-2}& 4.0\times {10}^{-4}\\ 3& 2.0\times {10}^{-2}& 4.0\times {10}^{-2}& 8.0\times {10}^{-4}\end{array}$
Which of the following inference(s) can be drawn from the above data ?

1. Rate constant of the reaction is $1.0\times {10}^{-4}$

2. Rate law of the reaction is: rate $=k\left[A\right]\left[B\right]$

3. Rate of reaction increases four times on doubting the concentration of both the reactants.

Select the correct answer using the codes given below:

What is an oxidation reaction? Give an example of oxidation reaction.Is oxidation an exothermic or an endothermic reaction?

1. 350

Mercury + sulphuric acid $\to$ No reaction. This is because

A student mixes quick lime and water in a test tube and touches its side surface. Which of the following statement correctly describes the student's observation?

What is law of multiple proportion ? Explain with an example clearly

Identify $\text{X}$.
${CO}_2+NaOH\to H_{2}O+X$

An ideal fuel is cheap, readily available, easily combustible and easy to transport. It has high calorific value. It does not produce gases or residues that pollute the environment.

Based on the above statements which of the following is closest to being an ideal fuel?

Identify the element Y in the following reaction.

$Y+2HCl\to 2NaCl+H_{2}O+S{O}_2$

An element forms an oxide which is acidic in nature.Is the element a metal or non-metal?

what happens when coal is heated in air ? State the uses of coal.

Choose the thermoplastics and thermosetting plastics from the following :

Melamine, Polythene, Bakelite, Polyvinyl chloride

Which of the following does not produce a flame on burning ?

Camphor, Charcoal, Kerosene

'Rayon' is

Which transition metal is part of the oldest known pills and does not corrode like iron?

Which of the following kind of solution is possible?

People use a variety to methods to wash clothes. Usually after adding the soap, they 'beat' the clothes on a stone, or beat it with a paddle, scrub with a brush or the mixture is agitated in a washing machine. Why is agitation necessary to get clean clothes ?

Gas cylinders(LPG) used in houses for cooking and CNG in vehicles are examples of gases in compressed state. Can you think of any other examples that uses the property of compressibility of a gas?

Minimum 10 examples-Maximum 20 examples

Pls try to give fast reply with correct answers.

Regards Mahima,

Which of the following are the properties of carbon dioxide?

Which of the following gas does not contribute to the formation of acid rain ?

(a) nitrogen monoxide

(b) carbon monoxide

(c) sulphur dioxide

(d) nitrogen dioxide

Washing soda is the common name for

Which plastic is used :

(a) for making uniforms of fire-men fire resistant ?

(b) for giving non-stick coating on frying pans?

(c) for making handles of frying pans ?

(d) for making insulation (covering) of electric wires ?

(e) for making electric switches ?

(f) for making flexible water bottles ?

One of the following is not an exhaustible source of energy. This one is :

(a) natural gas.

(b) petroleum gas

(c) coal gas

(d) biogas

Consider the following reaction.
$CaC{O}_3$ + $H_{2}O$ + $C{O}_2$ $\to$ $Ca(HC{O}_3{)}_2$

$\begin{array}{cc}\text{Element}& \text{Number of atoms present}\end{array}$
$\begin{array}{ccc}& \text{Reactant side}& \text{Product side}\\ \text{Calcium}& 1& 1\\ \text{Carbon}& 2& \text{Y}\\ \text{Oxygen}& \text{X}& 6\\ \text{Hydrogen}& 2& 2\end{array}$
Recognise $X$ and $Y$. The value of $X+Y$ is___.

What are the advantages of using LPG as fuel ?

Acid rain can damage.

Which of the following help in lowering the melting point of ice and why?

What is the difference between different types of plastic?

Is honey, jelly , rubber band a solid or a liquid??

In which of the following conditions, the distance between the molecules of hydrogen gas inside the container would increase?
(i) Some hydrogen gas leaking out of the container
(ii) Increasing the volume of the container of hydrogen gas
(iii) Adding more hydrogen gas to the container while keeping the volume constant

What is a ions ?whether it is a iron or not .

Which of the following are non-metals?

The pancreatic juice makes the medium ______ in the small intestine for the action of enzymes present there.

The halide that is highly soluble in H2O among the following is

$AgN{O}_3\left(aq\right)+HCl\left(aq\right)\to Product$

In the above reaction, the product formed as a precipitate is :

Rust of iron is basically:

Which of the following is known as water producing gas?

(a) Define 'mixture'

(b) Why is it necessary to separate the constituents of a mixture ?

(c) State four differences between compounds and mixtures

Identify the uncountable noun in the sentence.

Plastic has been banned by the Government owing to pollution and climate change.

What is the nature of rust.

How is the fire caused by electricity extinguished?

Why Oxygen is collected by water displacement?