Classification of Matter

Q.

Differentiate between metal and non-metal on the basis of their chemical properties.

Q.

Write an example of dilute and concentrated acids.

Q. Can carbon form ionic compounds?

Q. Give the name and formula of two
(a) strong monobasic acids
(b) weak dibasic acids
(c) non-volatile acids
(d) volatile acids

Q. Magnesium ribbon burns in air with dazzling white flame to give a compound ‘X’. If the burning ribbon is placed in a gas jar containing nitrogen gas only, it continues to burn and forms a compound ‘Y’. ‘X’ and ‘Y’ respectively are

मैग्नीशियम रिबन वायु में चमकदार श्वेत लौ के साथ जलता है तथा यौगिक ‘X’ प्राप्त होता है। यदि जलते हुए रिबन को केवल नाइट्रोजन गैस से भरे गैस जार में रखा जाता है, तो यह लगातार जलता रहता है तथा यौगिक ‘Y’ बनता है। ‘X’ तथा ‘Y’ क्रमशः हैं

1. Mg(OH)₂ and Mg(NO₃)₂
   
   Mg(OH)₂ तथा Mg(NO₃)₂
2. MgO and MgNO₂
   
   MgO तथा MgNO₂
3. MgO and MgN₂
   
   MgO तथा MgN₂
4. MgO and Mg₃N₂
   
   MgO तथा Mg₃N₂

Q.

In case of non-polar covalent bond, the covalent bond is formed in the ___ of atoms and shared electrons are ___ distributed.

1. Corner, Unequally

2. Middle, Equally

3. Middle, Unequally

4. Corner, Equally

Q.

pH has great importance in our daily life. Explain by giving three examples.

Q. Explain the formation of $H_3{O}^{+}$ and ${\mathrm{NH}}_4^{+}$ ion

Q. What happens when $O_2$ molecule is formed?

1. Oxygen atom loses electrons and becomes positively charged.
2. Oxygen atom gains electrons and becomes negatively charged.
3. 2 oxygen atoms share electrons.
4. Ionized oxygen atoms are engulfed in a sea of electrons.

Q. How is the $O_2$ molecule formed?

1. Oxygen atom gains electrons and becomes negatively charged.
2. The two oxygen atoms share electrons.
3. Ionized oxygen atoms are engulfed in a sea of electrons.
4. Oxygen atom loses electrons and becomes positively charged.

Q. Which of the following tend to gain electrons easily?

1. Metals
2. Non-metals
3. Noble gases
4. Metalloids

Q. Which of the following substances does not contain acid?

1. Baking Soda
2. Curd
3. Orange
4. Vinegar

Q. Metalloids are highly electropositive.

1. True
2. False

Q.

Define Electro negative, Electro positive and metalloids.

Q. What particles are present in pure lead bromide?

Q.

The addition of dilute Hydrochloric Acid to a solution containing the Anion Q and the subsequent use of limewater can be used to identify the Anion Q. What is Q?

1. A Carbonate

2. An Iodide

3. A Chloride

4. A Sulfate

Q. The pH of three solutions A, B, and C are 8, 2, and 7 respectively. Find the right option.

(a) A: Acid; B: Base; C: Neutral
(b) A: Base; B: Neutral; C: Acid
(c) A: Base; B: Acid; C: Neutral
(d) A: Neutral; B: Base; C: Acid

Q. Define non-metals. Give five examples of non-metals.

Q.

Form a sentence using the following words – baking soda, ant bite, moist, effect, neutralised, rubbing

Q.

Which of the following is the correct representation of ammonium ion?

1. 

2. 

3. 

4. 

Q. From the given options, choose the one which can form an ionic compound.

1. O and O
2. Ba and O
3. O and Cl
4. Li and K

Q. what is electropositive and electronegative elements?

Q. Question 22
The correct electron dot structure of a water molecule is

(a)
(b)
(c)
(d)

Q.

What is the difference between sodium carbonate and sodium carbonate solution?

Q. Why is the concentrated sulphuric acid is weaker acid compared to dilute sulphuric acid?

1. Less presence of $O{H}^{-}$
2. Less presence of $H^{+}$
3. All of the above
4. Easily gives $H^{+}$

Q.

What are metalloids?

Please answer with description.

Q.

What is the strongest chemical bond?

1. Diamond

2. Neon (Solid)

3. KCl

4. Ice

Q. Which compound is produced by the action of chlorine on dry slaked lime?

Q. Which of the following substance does not contain acid?

1. Baking soda
2. Curd
3. Orange
4. Vinegar

Q.

Which of the following bond/s contain ions?
(i) Ionic bond
(ii) Covalent bond
(iii) Metallic bond

1. only (i)

2. (i) and (iii)

3. (ii) and (iii)

4. (i), (ii) and (iii)