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Which of the following statements is/are false regarding modern periodic table?<br>1. Elements in the modern periodic table are arranged in decreasing order of their atomic numbers.<br>2. Elements in the modern periodic table are arranged in increasing order of their atomic masses.<br>3. In the modern periodic table, isotopes are placed in adjacent groups.<br>4. Elements in modern periodic table are arranged in increasing order of their atomic numbers.

Correct Answer: 1, 2 and 3

Consider the following statements :
In the first zone of production function
1. The APP is increasing and then decreasing
2. The MPP is increasing and then decreasing
3. TPP is increasing
4. APP is decreasing
Which of the above statements are correct

Profits can be increased by
1. decreasing the selling price per unit.
2. increasing the selling price per unit.
3. decreasing the volume of sales.
4. increasing the volume of sales.
5. decreasing the fixed or variable expenses.
6. increasing the fixed or variable expenses.
7. giving more weightage for products having higher P/V ratio.
8. giving less weightage for products having higher P/V ratio.
Select the correct answer

Each of the questions below consists of a question and three statements numbered I, II and III given below it. You have to decide whether the data provided in the statements are sufficient to answer the question. Read all the three statements and give answer. There are six letters E, I, P, G, N and O is PIGEON the word formed after performing the following operations using these six letters only? I. O is placed fourth to the right of P. G is not placed immediately next to either P or O. II. N is placed immediately next (either left or right) to O. E is placed immediately next (either left or right) to G. III. Both I and E are placed immediately next to G. The word does not begin with N. P is not placed immediately next to E.

SN1 reaction undergoes through a carbocation intermediate as follows: (X = Cl, Br, I) The correct statements are: I. The decreasing order of rate of SN1reaction is t-BuX > iso-PrX > EtX > MeX II. The decreasing order of ionization energy is MeX > EtX > iso-PrX > t-BuX III. The decreasing order of energy of activation is t-BuX > iso-PrX > EtX > MeX

When the elements are arranged in increasing order of atomic weights, the atomic weight of the middle element is approximately the average of the atomic weights of the other two elements' - this rule is known as-

Six numbers are arranged in decreasing order. The average of the first five numbers is 30 and the average of the last five numbers is 25. The difference of the first and the last numbers is

Consider the following statements,
1. In Mendeleef's periodic table, position of the isotopes was not fixed.
2. In the 19th century, Mendeleef propounded periodic law is based on atomic mass.
Which of the above statement(s) is/are correct?

Who designed the modern periodic table, according to which "the physical and chemical properties of elements are the periodic functions of their atomic numbers".

Consider the given question and decide which of the following statements is sufficient to answer the question. All natural numbers are whole numbers?
(I) All natural numbers plus 0 are called whole numbers (II) Whole numbers are different from natural numbers

Consider the following statements.
1. All valid arguments contain only true premises and a true conclusion.
2. Some valid arguments contain only false propositions - false premises and a true conclusion.
3. All valid arguments contain only false propositions all premises are false, conclusion is false as well.
Which of the above statements is correct?