List of top Chemistry Questions

Choose the correct option.

The major product formed in the following reaction is

Choose the correct answer from the options given below:

Red ppt. by Benedict solution is?

Sulphur (S)-containing amino acids from the following are:
(a) Isoleucine
(b) Cysteine
(c) Lysine
(d) Methionine
(e) Glutamic acid

Match the terms in Column-I with their description in Column-II and choose the correct option :

Column I		Column II
(i)	Vitamin A	a	Beri-beri
(ii)	Vitamin C (Ascorbic acid)	b	Cheilosis
(iii)	Riboflavin	c	Xerophthalmia
(iv)	Thiamine	d	Scurvy

One which does not stabilize secondary and tertiary protein?

We are given some diseases in Column II. Column-I contains name of some vitamins and their deficiencies will cause:

Column-I		Column-II
(A)	Vitamin A	(p)	Scurvy
(B)	Vitamin B₂	(q)	Xerophthalmia
(C)	Vitamin B₁ (Thiamine)	(r)	Cheilosis
(D)	Vitamin C	(s)	Beri Beri

Glycosidic linkage between $C _1$ of $\alpha$-glucose and $C_2$ of $\beta$-fructose is found in

Compound $A , C _5 H _{10} O _5$, given a tetraacetate with $AC _2 O$ and oxidation of $A$ with $Br _2- H _2 O$ gives an acid, $C _5 H _{10} O _6$ Reduction of $A$ with $HI$ gives isopentane The possible structure of $A$ is:

Number of compounds from the following which will not produce orange red precipitate with Benedict solution is ____________
Glucose, maltose, sucrose, ribose, 2-deoxyribose, amylose, lactose

An indicator ' X ' is used for studying the effect of variation in concentration of iodide : on the rate of reaction of iodide ion with $H_2O_2 $ at room temp. The indicator ' X ' forms blue colored complex with compound ' A ' present in the solution. The indicator ' X ' and compound 'A' respectively are

L-isomer of tetrose X ($C_4H_8O_4$) gives positive Schiff’s test and has two chiral carbons. On acetylation, ‘X’ yields triacetate. ‘X’ undergoes following reactions

Chiral compound ‘X’ is

The number of electrons involved in the reduction of permanganate to manganese dioxide in acidic medium is _______

Oxidation number of Mo in Ammonophosphomolybdate

Which of following are reducing and oxidising agent respectively.

During the reaction of permanganate with thiosulphate, the change in oxidation of manganese occurs by value of 3. Identify which of the below medium will favour the reaction.

See the following chemical reaction: \[ \text{Cr}_2\text{O}_7^{2-} + \text{XH}^+ + \text{6Fe}^{2+} \rightarrow \text{YCr}^{3+} + \text{6Fe}^{3+} + \text{ZH}_2\text{O}. \] The sum of $X$, $Y$, and $Z$ is _____.

Identify $X , Y$ and $Z$ in the following reaction (Equation not balanced) $ClO + NO _2 \rightarrow \underline{ X } \stackrel{ H _2 O }{\longrightarrow} \underline{ Y }+\underline{Z}$

Consider the following reaction sequence: $[CaCl_2 + Na_2CO_3 → X+Y] → Z$

During the qualitative analysis of $ SO_{3}^{-2}$ using dilute H₂SO₄, SO₂ gas evolved which turns K₂Cr₂O₇ solution (acidified H₂SO₄)

Formation of photochemical smog involves the following reaction in which A, B, and C are respectively:
$\text{NO}_2 \xrightarrow{h\nu} \text{A} + \text{B}$
$\text{B} + \text{O}_2 \rightarrow \text{C}$
$\text{A} + \text{C} \rightarrow \text{NO}_2 + \text{O}_2$
Choose the correct answer from the options given below:

Find out the major product for the following reaction.

The correct reaction profile diagram for a positive catalyst reaction .

In Hall - Heroult process, the following is used for reducing Al₂O₃ :-

Major product 'P' formed in the following reaction is: