Tag: study of matter

Questions Related to study of matter

The first and last elements of the longest period are ___________.

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. francium and Uuo

  2. caesium and radon

  3. francium and radon

  4. caesium and Uuo

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Correct Option: B
Explanation:

Longest period is 6th period. It contains 32 elements. It starts with Caesium. The last element is Radon. 

7th period is not the longest as it contains less than 32 elements.

A, B, C are three elements with atomic numbers, Z-1, Z, and Z+1 respectively. B is an inert gas.
Identify the elements having same valence shell.
evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. A, B

  2. B, C

  3. A, C

  4. A, B, C

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Correct Option: A
Explanation:

Three elements A,B and C. B is a noble gas, A has atomic number 1 less than B and C has 1 more than B. Hence number of valence shell is same in A and B because on adding one electron to Noble gas that is 18 group next electron will occupy, alkali metals group in a next period hence increases in shell number.

Statement: A homogeneous mixture of solute and solvent is known as solution.


State whether the given statement is true or false.

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. True

  2. False

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Correct Option: A
Explanation:

Solutions are homogeneous mixtures containing two or more substances called the solute and solvent.

The solute is the substance that dissolves.

The solvent is the dissolving medium. When looking at a solution it is impossible to distinguish the solute from the solvent. 

Hence, the given statement is $\text{true}$.

Which of the following processes results in the formation of a new compound?

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. Dissolving common salt in water

  2. Heating water

  3. Heating platinum rod

  4. Heating iron rod

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Correct Option: A
Explanation:

Heating of any substance will give the same compound unless temperature is taken upto such high where the compound breaks down into its constituents. Dissolving common salt in water will give brine solution.

Match the column I and II and select the correct option from the codes given below:

   Column I   Column II 
 (P) Liquid  (i)  Highly compressible 
 (Q) Gas  (ii)  Definite volume 
 (R) Plasma  (iii)  Super low density 
 (S) Bose-Einstein condensate  (iv)  Super energetic  
evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. (P)-(i), (Q)-(ii),(R)-(iii),(S)-(iv)

  2. (P)-(ii), (Q)-(i),(R)-(iii),(S)-(iv)

  3. (P)-(ii), (Q)-(i),(R)-(iv),(S)-(iii)

  4. (P)-(iii), (Q)-(i),(R)-(ii),(S)-(iv)

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Correct Option: C
Explanation:

(P) Liquid have a definite volume as the particles are in contact with each other.

(Q) Gas is highly compressible as there is a huge distance between the gas molecules.
(R) Plasma (fourth state of matter) is a gas that has been energized to a point that some of the $e^-$ break free from but travel with their nucleus. A spark in the gas creates plasma.
(S) Bose-Einstein Condensate is formed by cooling a gas of extremely low density. It is the fifth state of matter.

Vinegar, which is commonly used in pickle preparation is actually:

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. Ethyl alcohol

  2. Folic acid

  3. Nitric acid

  4. Acetic acid

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Correct Option: D
Explanation:
Acetic acid (vinegar) is the primary ingredient used in pickle manufacturing. After water, it makes up the bulk of the pickle liquor and contributes significantly to the flavour of the pickle giving it a sour taste.

Hence, the correct option is $D$

The reference standard used for defining atomic mass is:

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. $H-1$

  2. $C-12$

  3. $C-13$

  4. $C-14$

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Correct Option: B
Explanation:

Atomic mass is defined as a multiple of one-twelfth the mass of the carbon-12 atom.

Which of the following is a chemical compound?

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. Salt

  2. Iron

  3. Oxygen

  4. Diamond

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Correct Option: A
Explanation:

Salt like $NaCl, MgCO _3, KCl,$ etc are compounds. Iron is an element. $O _2$ is a molecule. Diamond is pure elemental carbon compressed to its crystal form.

Match the columns I, II and III and mark the appropriate choice.

Column I Column II Column III
(A) Bromine (i) Noble metal (p) Amalgam
(B) Gold (ii) Crystalline non-metal (q) $4s^{2}4p^{5}$
(C) Mercury (iii) Liquid non-metal (r) Transition metal
(D) Iodine (iv) Liquid metal (s) Violet
evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. (A)$\rightarrow$(iii, q); (B)$\rightarrow$(i, r); (C)$\rightarrow$(iv, p); (D)$\rightarrow$(ii, s)

  2. (A)$\rightarrow$(ii, p); (B)$\rightarrow$(i, s); (C)$\rightarrow$(iii, q); (D)$\rightarrow$(iv, r)

  3. (A)$\rightarrow$(i, s); (B)$\rightarrow$(ii, p); (C)$\rightarrow$(iv, r); (D)$\rightarrow$(iii, q)

  4. (A)$\rightarrow$(iv, r); (B)$\rightarrow$(iii, q); (C)$\rightarrow$(ii, s); (D)$\rightarrow$(i, p)

Show answer
Correct Option: A
Explanation:
 Col I  Col II  Col III
 (A) Bromine  (iii)liquid non-metal  (q)$4s^24p^5$
 (B) Gold  (i) Noble metal  (r)Transition metal
 (C) Mercury  (iv)liquid metal  (p)Amalgam
 (D) Iodine  (ii)crystalline non-metal  (s)violet

(A)-(iii, q); (B)-(i, r); (C)-(iv, p); (D)-(ii, s)

option A

Match the atomic number 19, 15, 8, 4 and 2 with each of the following :                                                                                                               

evs look, learn and experience matter: states, classification and properties study of matter general introduction: importance and scope of chemistry

  1. 19: A metal of valency one.

  2. 15: A solid non-metal of period 3

  3. 8: A rare gas

  4. 2: A gaseous element with valency 2.

  5. 4: An element of group 2.

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Correct Option: A,B,E