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The formula of a metal oxide is $M_2{O}_3$. If the metal forms its chloride, what will the formula of that compound be?

De Broglie proposed that -

Select the options which have the correct characteristics of graphite.

Discuss the observations that helped Rutherford conclude the concept of a concentrated nucleus.
[3 MARKS]

Cold drink is a matter or not

Discuss briefly the physical and chemical properties of ethanoic acid. [5 MARKS]

Oxygen is found as a __________ molecule.

Which of the following is not an isotope of hydrogen?

suggest techniques used to separate liquids

Which among the given options is used for the preparation of the isotope deuterium?

Why the shape of bubbles are always round and they float in air. Why this happens and how

Calculate the number of moles of 360 gms of $H_{2}O$.

In modern terminology, Eka - Silicon is called ______.

State one instance where water undergoes a physical change and one in which it undergoes a chemical change.

Copper + nitric acid → ? + ?

Question 27
Match the substances in Column A with their applications given in Column B.

The positively and negatively charged ions are called as _____ and _____ respectively.

Which of the following statement is incorrect?

What is the symbol of Gold?

1. undefined
2. undefined
3. undefined
4. undefined

Tails of comets are visible due to:

Formula to convert Celsius into Kelvin

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 exhibit the weakest intermolecular forces?

A beam of alpha-particles is bombarded at a piece of gold foil as shown in the figure below.

After striking the gold foil, in which direction does most of the alpha-particles travel?

The alkyne used in the manufacturing of PVC is ___.

According to Bronsted Lowry theory, acids are defined as:

Valency of iron in $FeC{l}_2$ and $FeC{l}_3$ is _______ and _______ respectively.

Which of the following option(s) is/are true?

What is the name of above compound?

Sort the given metal halides in increasing order of melting point.

When a gas jar full the lower jar go upward into the jar containing air. In this experiment :

(a) air is heavier than bromine

(b) both air and bromine have the same density

(c) bromine is heavier than air

(d) bromine cannot be heavier than air because it is going upwards against gravity

In the following reaction acts as Bronsted-Lowry acid and acts as Bronsted-Lowrybase:
${\mathrm{NH}}_3\left(\mathrm{aq}\right)+H_{2}O\left(l\right)\to {{\mathrm{NH}}_4}^{+}\left(\mathrm{aq}\right)+{\mathrm{OH}}^{-}\left(\mathrm{aq}\right)$

A solution contains 'X' ml of ethyl alcohol mixed with 100ml of water. The concentration of the solution is 28.6% in terms of volume by volume percentage. Find X.

When you use air freshener, you spray in one corner of room and it spreads to the whole room very fast. This is because

What are atoms made up of ?

Determine the oxidation number of Phosphorous in $H_{3}P{O}_4$.