A sum of money under compound interest doubles itself in 4 years. In how many years will it become 16 times itself?
12 years
16 years
8 years
None of these
16 years
View Full Answer(6)
A certain loan amounts, under compound interest, compounded annually earns an interest of Rs.1980 in the second year and Rs.2178 in the third year. How much interest did it earn in the first year?
Rs.1600
Rs.1800
Rs.1900
None of these
xyz pqr abc year tt
View Full Answer(2) The following reaction occurs in the Blast Furnace where iron ore is reduced to iron metal : Fe2O3(s)+3 CO(g) 2 Fe(l)+3 CO2(g) Using the Le Chatelier’s principle, predict which one of the following will not disturb the equilibrium ?
Option: 1 Removal of CO
Option: 2 Removal of CO2
Option: 3 Addition of CO2
Option: 4 Addition of Fe2O3
According to Le Chatelier's principle change in concentration by changing the amount of reactant or product affect the equilibrium. However, the addition of solid reactant won't affect the concentration.
Therefore, addition of solid Fe2O???3 will not disturb the equilibrium.
View Full Answer(1)The ore that contains the metal in the form of fluoride is :
Option: 1 Cryolite
Option: 2 Malachite
Option: 3 Magnetite
Option: 4 Sphalerite
The formula of the ores -
[Contains the metal in the form of fluoride]
So, option 1 is correct.
View Full Answer(1)Study 40% syllabus and score up to 100% marks in JEE
The purest form of commercial iron is:
Option: 1 wrought iron
Option: 2 pig iron
Option: 3 scrap iron and pig iron
Option: 4 cast iron
Therefore, Option(1) is correct.
View Full Answer(1)Among the reactions (a) - (d), the reaction(s) that does / do not occur in the blast furnace during the extraction of iron is / are :
(a) (b) (c) (d)
Option: 1 (C) and (D)
Option:2 (A)
Option: 3 (A) and (D)
Option: 4 (D)
The following reactions do not occur in the blast furnace:
C)
D)
Therefore, Option(1) is correct.
View Full Answer(1)The refining method used when the metal and the impurities have low and high melting temperatures, respectively is:
Option: 1 vapour phase refining
Option: 2 distillation
Option: 3 liquation
Option: 4 zone refining
As we have learnt,
Liquation -
In this method, a low melting metal like a tin can be made to flow on a sloping surface. In this way, it is separated from higher melting impurities.
-
Liquation, a technique for separating constituents of ore, a metal or an alloy by partial melting. When the material is heated to a temperature where one of the constituents melts and the other remains solid, the liquid constituent can be drained off.
Therefore, Option(3) is correct.
View Full Answer(1)
Impure zinc is refined by the distillation method.
Therefore, the correct option is (2).
View Full Answer(1)
We know
Calcination Releases → CO2 → Global warming
Roasting Releases → SO2 → Acid Rain
The processes of calcination and roasting in metallurgical industries, respectively, can lead to Global warming and acid rain Due to the industrial processes SO2 gas is released which is responsible for acid rain & CO2 gas for global warming.
Therefore, the correct option is (2).
View Full Answer(1)
Among these, Option 2 has the most acidic H, Due to the presence of the 3 (COOR) group. More resonating structure more stability of negative charge.
Therefore, Option(2) is correct.
View Full Answer(1)Study 40% syllabus and score up to 100% marks in JEE
NEET
JEE Main
AIIMS MBBS
SSC CHSL
CBSE 12 Class
MAT
CLAT
Any
UG
PG
Diploma
Class 5
Class 11
Class 12
Class 10
Class 1
Class 2
Class 3
Class 4
Class 6
Class 7
Class 8
Class 9
Aptitude
Chemistry
Current Affairs including General Knowledge
General
General Aptitude
General Awareness
General Awareness
General Engineering ( Engineering )
General Engineering ( Mechanical )
General Intelligence & Reasoning
General Knowledge
General Knowledge
General Science
General Science
GK and Aptitude
Physics
Quantitative Aptitude
Quantitative Aptitude
Quantitative Aptitude
Chemistry Part I Textbook for Class XII
Chemistry Part II Textbook for Class XII
Exemplar Chemistry for Class 12
General Principles and Processes of isolation of elements
Interest
General Principle and process of Isolation of metals
Sets, Relations and Functions
General Principles and processes of Isolation Elements