Which of the following represent the correct Element and Symbol Pair?

(i) Cobalt –CO

(ii) Copper-Cu

(iii)Potassium- K

(iv) Calcium-C

(v) Silicon-Sl

(vi) Silver- Ag

(vii)Barium-Ba

(viii)Iron-Ir

i, vii, v, vii

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ii,iii, vi, vii

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v, vi, ii, iv

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iii, v, vi,vii

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Solution

The correct option is B
ii,iii, vi, vii

Symbols of some elements are formed with the first letter of the name and second letter of the symbol is taken from the letters appearing later in the same name.

Other symbols have been taken from the names of the elements in Latin, German or Greek.

Second letter of a symbol is always in small characters.

Cobalt-Co and not CO, Copper (Cuprum)-Cu, Potassium (Kalium)-K, Calcium-Ca and not C, Silicon-Si not Sl, Silver (Argentum)-Ag, Barium-Ba, Iron (Ferrum)-Fe.

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Similar questions

Which of the following represent the correct Element and Symbol Pair?

(i) Cobalt –CO

(ii) Copper-Cu

(iii)Potassium- K

(iv) Calcium-C

(v) Silicon-Sl

(vi) Silver- Ag

(vii)Barium-Ba

(viii)Iron-Ir

What are the correct sets of Atomic masses (u) and Elements?

(i) N-14

(ii) Sulphur-34

(iii)Chlorine-36

(iv) Mg-24

(v) Cl-35.5

(vi) Oxygen-8

(vii)Na-23

Q. Match Column-I with Column-II and select the correct option from the codes given below.

	Column-I (Parts of alimentary canal of earthworm)		Column-II (Respective segments)
a.	Buccal cavity	(i)	1-3
b.	Pharynx	(ii)	3-4
c.	Oesophagus	(iii)	5-7
d.	Gizzard	(iv)	8-9
e.	Stomach	(v)	9-14
f.	Intestine	(vi)	15 to last
g.	Typhlosole	(vii)	After 26 except the last 23-25

Match the following

(1)–(iii), (viii); (2)–(i), (iv); (3)–(ii), (vi); (4)-(ii),(v); (5)–(iii), (iv); (6)–(i) (vii); (7)–(ii), (iv)
(1)–(ii), (vii); (2)–(i), (iv); (3)–(ii), (vi); (4)-(ii),(v); (5)–(ii), (iv); (6)–(i) (viii); (7)–(iii), (iv)
(1)–(ii), (vii); (2)–(i), (vii); (3)–(iii), (iv); (4)-(i),(v); (5)–(ii), (vi); (6)–(i) (vi); (7)–(i), (iv)
(1)–(ii), (vii); (2)–(i), (iv); (3)–(ii), (vi); (4)-(ii),(iv); (5)–(i), (viii); (6)–(iii) (iv); (7)–(iii), (vii)

Given below is a randomly arranged list of events that occur at the neuromuscular junction to trigger muscle contraction.Which of the following gives the correct sequence of these steps?

(i) Acetylcholine binds to the receptor sites on sarcolemma

(ii) Nerve impulse

(iii) Release of Ca+2 from sarcoplasmic reticulum

(iv) The neurotransmitter acetylcholine is released

(v) Sarcomere shortens

(vi) Acetylcholine diffuses across the synaptic cleft

(vii) Spread of impulses over sarcolemma on T-tubules

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