Saved Bookmarks
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1051. |
Two oxides of certain metal were separately heated with hydrogen and the water is formed when 2 gram of each oxide heated gives 0.25 17 gram and 0.4526 gram water is formed respectively show that law of multiple proportion is obeyed |
| Answer» Two oxides of certain metal were separately heated with hydrogen and the water is formed when 2 gram of each oxide heated gives 0.25 17 gram and 0.4526 gram water is formed respectively show that law of multiple proportion is obeyed | |
| 1052. |
Name the process which is used to separate the colours in a dye. |
|
Answer» Name the process which is used to separate the colours in a dye. |
|
| 1053. |
Which of the below given reactions is not a redox reaction? |
|
Answer» Which of the below given reactions is not a redox reaction? |
|
| 1054. |
Répondez:1. Que fait Mme Lavigne le samedi?2. Qu'est-ce qu'elle achète à la boucherie?3. Qu'est-ce qu'elle achète à la boulangerie?4. Où achète-t-on les fruits et les légumes? |
|
Answer» Répondez: 1. Que fait Mme Lavigne le samedi? 2. Qu'est-ce qu'elle achète à la boucherie? 3. Qu'est-ce qu'elle achète à la boulangerie? 4. Où achète-t-on les fruits et les légumes? |
|
| 1055. |
What is a manhole? Why are manholes made? [3 MARKS] |
|
Answer» What is a manhole? Why are manholes made? [3 MARKS] |
|
| 1056. |
How can we distinguish between acids and bases using the litmus paper indicator? |
|
Answer» How can we distinguish between acids and bases using the litmus paper indicator? |
|
| 1057. |
Which of the following is a white substance, having alkaline nature in solution? |
|
Answer» Which of the following is a white substance, having alkaline nature in solution? |
|
| 1058. |
What is acid rain? How are acid rain caused? |
| Answer» What is acid rain? How are acid rain caused? | |
| 1059. |
On the basis of kind of waste, which of the following set of waste materials belong to the same category? |
|
Answer» On the basis of kind of waste, which of the following set of waste materials belong to the same category? |
|
| 1060. |
54 Which of the following is correct stability order? (1) H2 > B2 > Li2 (2) B2 > Li2 > H2 (3) Li2 > B2 > H2 (4) H2 > Li2 > B2 |
| Answer» 54 Which of the following is correct stability order? (1) H2 > B2 > Li2 (2) B2 > Li2 > H2 (3) Li2 > B2 > H2 (4) H2 > Li2 > B2 | |
| 1061. |
What is the difference between acid and bases on theb basis of chemical property |
| Answer» What is the difference between acid and bases on theb basis of chemical property | |
| 1062. |
A red brown gas is released on heating lead nitrate. This reaction is an example of: |
|
Answer» A red brown gas is released on heating lead nitrate. This reaction is an example of: |
|
| 1063. |
What is employed to remove oil and grease from wastewater? |
|
Answer» What is employed to remove oil and grease from wastewater? |
|
| 1064. |
(D) NaBH4The relative reactivity of 10H, 20H and 3^° H in bromination reaction has been found to be1: 82 1600 respectively. In the reaction CH3CHCH3CH3 (excess) +Br2\xrightarrow[{hν}]{} CH3CH3BrCCH3+CH3-CH3CH-CH2Br the percentage yields of the products (A) and (B) are expected to be(A) 99.4%, 0.6%(B) 50%, 50%(C) 0.6%, 99.4%(D) 80%,20% |
| Answer» (D) NaBH4The relative reactivity of 10H, 20H and 3^° H in bromination reaction has been found to be1: 82 1600 respectively. In the reaction CH3CHCH3CH3 (excess) +Br2\xrightarrow[{hν}]{} CH3CH3BrCCH3+CH3-CH3CH-CH2Br the percentage yields of the products (A) and (B) are expected to be(A) 99.4%, 0.6%(B) 50%, 50%(C) 0.6%, 99.4%(D) 80%,20% | |
| 1065. |
Major contributors to acid rain are: |
|
Answer» Major contributors to acid rain are: |
|
| 1066. |
Mention few properties of acids. |
| Answer» Mention few properties of acids. | |
| 1067. |
At 407 K, the rate constant of a chemical reaction is 9.5×10−5s−1 and at 420 K, the rate constant is 1.9×10−4s−1. Find the value of log(A) where A is the frequency factor of the reaction. Take:log (9.5)=0.97 |
|
Answer» At 407 K, the rate constant of a chemical reaction is 9.5×10−5s−1 and at 420 K, the rate constant is 1.9×10−4s−1. Find the value of log(A) where A is the frequency factor of the reaction. |
|
| 1068. |
In the chemical reaction A+B→AB; B is acting as a limiting reagent then choose the correct option. |
|
Answer» In the chemical reaction A+B→AB; B is acting as a limiting reagent then choose the correct option. |
|
| 1069. |
If Cu^{+2}/Cu electrode is diluted 100 times,then the change in emf is-increase of 59 mV-decrease of 59 mV-increase of 29.5 mV-decrease of 29.5m |
| Answer» If Cu^{+2}/Cu electrode is diluted 100 times,then the change in emf is-increase of 59 mV-decrease of 59 mV-increase of 29.5 mV-decrease of 29.5m | |
| 1070. |
Match the following: (i)Water(A)Compound(ii) Hydrogen(B) Element(iii) Salt(iv) Gold(v) Carbon dioxide(vi) Iron The correct pairs are:- |
|
Answer» Match the following:
|
|
| 1071. |
In the nuclear transmutation,94Be+X→84Be+Y(X, Y) is/are: |
|
Answer» In the nuclear transmutation, |
|
| 1072. |
Why does buttermilk kept in a copper vessel get spoilt? |
|
Answer» Why does buttermilk kept in a copper vessel get spoilt? |
|
| 1073. |
Answer the following: a) Vinegar is mixed with baking soda. Can you get vinegar and the bicarbonate back from the resultant mixture? Is it a chemical or a physical change? b) How can we confirm the release of carbon dioxide? [3 MARKS] |
|
Answer» Answer the following: a) Vinegar is mixed with baking soda. Can you get vinegar and the bicarbonate back from the resultant mixture? Is it a chemical or a physical change? b) How can we confirm the release of carbon dioxide? [3 MARKS] |
|
| 1074. |
Question 09.If a few drops of a concentrated acid accidentally spills over the hand of a student, what should be done ?(a) Wash the hand with saline solution(b) Wash the hand immediately with plenty of water and apply a paste of sodium hydrogencarbonate(c) After washing with plenty of water apply solution of sodium hydroxide on the hand(d) Neutralise the acid with a strong alkali |
|
Answer» Question 09. |
|
| 1075. |
Which of the following is/are correct regarding a chemical reaction? |
|
Answer» Which of the following is/are correct regarding a chemical reaction? |
|
| 1076. |
Which the following can conduct electricity in a fused or molten state? |
|
Answer» Which the following can conduct electricity in a fused or molten state? |
|
| 1077. |
Sketch the cross section of soil and label the various layers. |
|
Answer»
|
|
| 1078. |
In a change, new substances having different molecules are formed. Is the change physical or chemicals? |
| Answer» In a change, new substances having different molecules are formed. Is the change physical or chemicals? | |
| 1079. |
On the basis of its molecular composition, ___ is called as oxy-acid. |
|
Answer» On the basis of its molecular composition, ___ is called as oxy-acid. |
|
| 1080. |
Why does pink colour appear on gradually adding sodium hydroxide to a solution of acid having 2-3 drops of phenolphthalein? |
|
Answer» Why does pink colour appear on gradually adding sodium hydroxide to a solution of acid having 2-3 drops of phenolphthalein? |
|
| 1081. |
Which of the following has more number of atoms? |
|
Answer» Which of the following has more number of atoms? |
|
| 1082. |
how to find equivalent weights of different compounds in a given equation? |
| Answer» how to find equivalent weights of different compounds in a given equation? | |
| 1083. |
Between ebonite and wool, what is the direction of transfer of electrons? |
|
Answer» Between ebonite and wool, what is the direction of transfer of electrons? |
|
| 1084. |
Maximum prescribed limit of Al in drinking water is 0.x ppm. The value of x is: |
|
Answer» Maximum prescribed limit of Al in drinking water is 0.x ppm. The value of x is: |
|
| 1085. |
The process of separation of woolen hairs of different textures is known as: |
|
Answer» The process of separation of woolen hairs of different textures is known as: |
|
| 1086. |
We know that bleeching powder is a basic substance.We also know that if we rub a turmeric stain with base,it becomes dark red.I heard that bleeching powder can vanish any stain from white cloth.How that become possible? |
| Answer» We know that bleeching powder is a basic substance.We also know that if we rub a turmeric stain with base,it becomes dark red.I heard that bleeching powder can vanish any stain from white cloth.How that become possible? | |
| 1087. |
Question 3What is the role of the acid in our stomach? |
|
Answer» Question 3 |
|
| 1088. |
Which among full filled shell or half filled shell is more stable? |
| Answer» Which among full filled shell or half filled shell is more stable? | |
| 1089. |
Strong electrolytes are those which |
|
Answer» Strong electrolytes are those which |
|
| 1090. |
What are the uses of synthetic detergents? |
|
Answer» What are the uses of synthetic detergents? |
|
| 1091. |
60. A crystal is madeup of particles P Q, R. P forms fco packing. Q occupies all otahedral voids of P and R occypies all tetrahedral voids of P. If all the particles along one body diagonal are remove, then the formula of the crystal would be (1) P2QR2 (2) PQR2 (4) PBQ4 |
| Answer» 60. A crystal is madeup of particles P Q, R. P forms fco packing. Q occupies all otahedral voids of P and R occypies all tetrahedral voids of P. If all the particles along one body diagonal are remove, then the formula of the crystal would be (1) P2QR2 (2) PQR2 (4) PBQ4 | |
| 1092. |
Name the source from which litmus solution is obtained. |
|
Answer» Name the source from which litmus solution is obtained. |
|
| 1093. |
Ozone is sprayed in the swimming pools because |
|
Answer» Ozone is sprayed in the swimming pools because |
|
| 1094. |
explain hell heroults process . why cryolite is not directly electrolysed to get aluminium |
| Answer» explain hell heroults process . why cryolite is not directly electrolysed to get aluminium | |
| 1095. |
In which of the following cases does the reaction go farthest to completion? |
|
Answer» In which of the following cases does the reaction go farthest to completion? |
|
| 1096. |
How will we come to know which colour precipitate is formed in the double displacement reaction? |
| Answer» How will we come to know which colour precipitate is formed in the double displacement reaction? | |
| 1097. |
The molecular formula of potassium nitrate is: |
|
Answer» The molecular formula of potassium nitrate is: |
|
| 1098. |
How can a sponge be solid |
|
Answer» How can a sponge be solid |
|
| 1099. |
Why is wastewater passed through bar screens in a wastewater treatment plant? |
|
Answer» Why is wastewater passed through bar screens in a wastewater treatment plant? |
|
| 1100. |
1) Give reasons to justify -a) water at room temperature is a liquid. b) an iron almirah is a solid at room temperature. |
|
Answer» 1) Give reasons to justify - a) water at room temperature is a liquid. b) an iron almirah is a solid at room temperature. |
|