Chemistry

The refining method used when the metal and the impurities have low and high melting temperatures, respectively is

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11 months ago

In the following reactions, products(A) and $(B)$ respectively are $\underset{(Hot and Conc)}{N a O H} + {C l}_{2} ? (A) +$ side products

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alok kumar singh

Contributor-Level 10

$6 N a O H + 3 {C l}_{2} ? 5 N a C l + {N a C l O}_{3} + 3 H_{2} O$

$2 C a (O H)_{2} + {C l}_{2} ? C a (O C l)_{2} + {C a C l}_{2} + H_{2} O$

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11 months ago

The photochemical smog does not generally contain

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Photochemical smog generally does not content SO₂ gas.

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11 months ago

The interhalogen compound formed from the reaction of bromine with excess of fluorine is:

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$B r_{2} + 5 F_{2} (e x c e s s) \to 2 B r F_{5}$

$B r F_{5} + 3 H_{2} O \to H B r O_{3} + 5 H F$

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11 months ago

The geometry around boron in the product 'B' formed from the following reaction is

$B F_{3} + N a H \overset{450 K}{\to} A + N a F$

A + NMe₃ $\overset{}{\to} B$

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$2 B F_{3} + 6 N a H \to B_{2} H_{6} + 6 N a F$

$B_{2} H_{6} + 2 \ddot{N} {(M e)}_{3} \to 2 H_{3} B \leftarrow : N {(M e)}_{3}$

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11 months ago

Choose the correct order of density of the alkali meals:

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Contributor-Level 10

Density of metal a very specific and depends upon many factors.

Li -> 0.53 gm/cm³

Na -> 0.97 gm/cm³

K -> 0.86 gm/cm³

Rb ->1.53 gm/cm³

Cs -> 1.90 gm/cm³

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11 months ago

The reaction of H₂O₂ with potassium permanganate in acidic medium leads to the formation of mainly.

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$2 M n O_{4}^{-} + 6 H^{+} + 5 H_{2} O_{2} \to 2 M n^{2 +} + 8 H_{2} O + 5 O_{2}$

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11 months ago

The compound(s) that is (are) removed as slag during the extraction of copper is:

(A) CaO

(B) FeO

(C) Al₂O_{3 &n}

...more

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Contributor-Level 10

$F e O + \underset{(A c i d i c f l u x)}{S i O_{2}} \to \underset{(S l a g)}{F e S i O_{3}}$

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11 months ago

The IUPAC nomenclature of an element with electronic configuration [Rn] 5f¹⁴6d¹7s² is:

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IUPAC nomenclature of element with atomic no. 103 is uniltrium.

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11 months ago

Match the List-I with List-II

List-I	List-II
(A) N₂(g) + 3H₂(g) -> 2NH₃(g)	(I) Cu
(B) CO(g) + 3H₂(g) -> CH₄(g) + H₂O(g)	(II) Cu/ZnO – Cr₂O₃
(C) CO(g) + H₂(g) -> HCOH(g)	(III) Fe_xO_y + K₂O + Al₂O₃
(D) CO(g) + 2H₂(g) -> CH₃OH(g)	(IV) Ni

Choose the correct answer from the options given below:

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