Match the items of Column I with the items of Column II and assign the correct code- begin array 1- hlinell Column I-Column IIA- Sapphire-1- Al2O3 3 B- Sphalerite- 2 - - NaCN C- Depressant-3- - CollD- Corundum-4- ZnSIl -5- Fe2O3lllhline lendarray Codes- A B C D A B C D- - a 3 4 2 1 b 5 4 3 2- c 2 3 4 5 d 1 2 3 4 - -

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Byju's Answer

Standard XII

Chemistry

Froth Floatation

Match the ite...

Question

Match the items of Column I with the items of Column II and assign the correct code.
$\begin{matrix} C o l u m n I & C o l u m n I I A . S a p p h i r e & 1. A l_{2} O_{3} B . S p h a l e r i t e & 2. N a C N C . D e p r e s s a n t & 3. C o D . C o r u n d u m & 4. Z n S 5. F e_{2} O_{3} \end{matrix}$
Codes
A B C D A B C D
(a) 3 4 2 1 (b) 5 4 3 2
(c) 2 3 4 5 (d) 1 2 3 4

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Solution

(a) $A . \to (3)$ $B . \to (4)$ $C . \to (2)$ $D . \to (1)$
A. Sapphire is a gemstone which contain Co.
B. Molecular formula of sphalerite is ZnS.
C. NaCN is used as a depressant in froth floatation method.
D. Molecular formula of corundum is $A l_{2} O_{3} .$

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Match the items of Column I with the items of Column II and assign the correct code.
$\begin{matrix} C o l u m n I & C o l u m n I I A . C o l o u r e d b a n d s & 1. Z o n e r e f i n i n g B . I m p u r e m e t a l t o v o l a t i l e c o m p l e x & 2. F r a c t i o n a l d i s t i l l a t i o n C . P u r i f i c a t i o n o f G e a n d S i & 3. M o n d^{'} s p r o c e s s D . P u r i f i c a t i o n o f m e r c u r y & 4. C h r o m a t o g r a p h y 5. L i q u a t i o n \end{matrix}$
Codes
A B C D A B C D
(a) 1 2 4 5 (b) 4 3 1 2
(c) 3 4 2 1 (d) 5 4 3 2

Q. Match the items of Column - I with the items in Column II and suggest the correct code

Q. Match the following items of column I with column II

\begin{matrix} Column I & column II (a) & If f (x) = \int_{0}^{g (x)} \frac{d t}{\sqrt{1 + t^{3}}} where g (x) = & (p) & 2 \int_{0}^{cos x} (1 + sin t^{2}) d t, then the value of f (\frac{π}{2}) is (b) & If \int_{a}^{b} (2 + x - x^{2}) d x is maximum, then (a + b) is & (q) & - 2 equal to (c) & If {lim}_{x \to 0} (\frac{sin 2 x}{x^{3}} + a + \frac{b}{x^{2}}) = 0, then (3a + b) is equal & (r) & 1 to (d) & Number of points of maxima for f (x) = \frac{x}{1 + x tan x} in & (s) & - 1 x ϵ (0, \frac{π}{2}) \end{matrix}

Question 26
Match the items given in Column I with the items of Column II.

$\begin{matrix} Column I & Column II (a)Used for road surfacing & (i)Black gold (b)Natural gas & (ii)Vaseline and candles (c)Petroleum & (iii)Bitumen (d)Paraffin wax & (iv)CNG \end{matrix}$

Match the items of Column I with items of Column II and assign the correct code.
$\begin{matrix} C o l u m n I & C o l u m n I I A . B l i s t e r r e d C u & 1. A l u m i n i u m B . B l a s t f u r n a c e & 2. 2 C u_{2} O + C u_{2} S ⟶ 6 C u + S O_{2} C . R e v e r b e r a t o r y f u r n a c e & 3. I r o n D . H a l l - H e r o u l t p r o c e s s & 4. F e O + S i O_{2} ⟶ F e S i O_{3} 5. 2 C u_{2} S + 3 O_{2} ⟶ 2 C u_{2} O + 2 S O_{2} \end{matrix}$
Codes
A B C D A B C D
(a) 2 3 4 1 (b) 1 2 3 5
(c) 5 4 3 2 (d) 4 5 3 2

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Match the items of Column I with the items of Column II and assign the correct code. Column IColumn IIA. Sapphire1. Al2O3B. Sphalerite2. NaCNC. Depressant3. CoD. Corundum4. ZnS5. Fe2O3 Codes A B C D A B C D (a) 3 4 2 1 (b) 5 4 3 2 (c) 2 3 4 5 (d) 1 2 3 4

(a) A.→(3) B.→(4) C.→(2) D.→(1) A. Sapphire is a gemstone which contain Co. B. Molecular formula of sphalerite is ZnS. C. NaCN is used as a depressant in froth floatation method. D. Molecular formula of corundum is Al2O3.

(a) $A . \to (3)$ $B . \to (4)$ $C . \to (2)$ $D . \to (1)$
A. Sapphire is a gemstone which contain Co.
B. Molecular formula of sphalerite is ZnS.
C. NaCN is used as a depressant in froth floatation method.
D. Molecular formula of corundum is $A l_{2} O_{3} .$