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When are the uses of antiseptics?

What force keeps the particles together in matter?

An NGO which works for the welfare of people living in villages observed a few situations in a village and its surrounding areas. Which of these observations according to you signifies water scarcity?

Question 8 (d)

Fill up the blanks
Impurities settled at the bottom when muddy water was kept overnight in a bucket.
The clear water was then poured off from the top. The process of separation used in this example is called ___.

Choose the correct option regarding pH of a salt:

The increased volume of which gas in the atmosphere is affecting the Earth’s weather and climate?

For a spontaneous cell reaction, the sign of $\Delta G^0$ and $E_{cell}^0$ will be respectively:

Which of the following water is fit for drinking?

Which of the following places will have more chances of flooding during heavy rainfall?

Life would be impossible without plants. Explain.

What steps can be taken to conserve groundwater?

$Na$ + $O$ $\to$ $Y$

$Y$ + $H_{2}O$ $\to$ $Y$

The commercial name of Z is _________.

Camphor looks similar to common salt, but its boiling point is ${209}^o$ C. Which of the following methods can be used to separate them?

Which of the following chemical equation satisfies the law of conservation of mass?

Which of the following substances will change the colour of red litmus into blue?

The physical state of salt that dissolves in water and forms solution is:

What is the property called due to which metallic bells work?

Which of the following substance is a non-biodegradable waste?

Ram wants to separate salt from seawater. He evaporates sea water to obtain salt from it but the salt obtained is impure. Which of the following process will he use to obtain pure crystals of salt?

Aromatherapy is a term used to describe the practice of using essential oils taken from plants, flowers, roots, seeds, etc., in healing. The term is a bit misleading, since the aromas of oils, whether natural or synthetic, are generally not themselves therapeutic. Aromas are used to identify the oils, to determine adulteration, and to stir the memory, but not to directly bring about a cure or healing.
The above argument assumes that:

What is the basis of long form of periodic table?

Write five metal hydroxide with its molecular formula.

For the electrochemical cell, $Mg\text{(s)}|M{g}^{2+}\text{(aq.1 M)}||C{u}^{2+}\text{(aq.1 M)}|Cu\text{(s)}$ the standard emf of the cell is $2.70\text{V}$ at $300\text{K}$. When the concentration of $M{g}^{2+}$ is changed to $x\text{M}$, The cell potential change to $2.67\text{V}$ at $300\text{K}$. The value of $x$ is _________

(given, $F/R=11500{\text{KV}}^{-1}$, Where $F$ is the Faraday constant and $R$ is the gas constant, $\ln \left(10\right)=2.30)$

Which of the following is / are the product(s) of neutralization reaction?

$C{O}_2$ extinguishers help extinguish fires by

One molecule of hydrogen and one molecule of chlorine react to give __ molecule(s) of hydrochloric acid.

Razia
conducted an experiment in the field related to the rate of
percolation. She observed that it took 40 min for 200 mL of water to
percolate through the soil sample. Calculate the rate of percolation.

Question 42

Why does Mathura refinery pose problems to the Taj Mahal?