Consider the following statement : There exists a pair of straight lines that are everywhere equidistant from one another. Do you think that this statement is (or is not) a direct consequence of Euclid’s fifth postulate ? Explain.

Consider ‘postulate’ given below. There exist at least three points that are not on the same line. Do this postulate contains any undefined term ? Is this postulate consistent ? Do they follow from Euclid’s postulate ? Explain.

Consider ‘postulate’ given below. Given any two distinct points A and B, there exists a third point C which is between A and B. Do this postulate contains any undefined term ? Is this postulate consistent ? Do they follow from Euclid’s postulate ? Explain.

Write the component statements of the following compound statement and check whether the compound statement is true or false. A line is Straight and extends indefinitely in both directions.

Consider the following figure of line vec(MN) . Say whether following statements are true or false in context of the given figure. M is one of the end points of the line segment vec(QO)

Consider the following reactions: Zn(s)+cu^(2+)(aq)rarrZn^(2+) (aq)+Cu(s) With reference to the above reaction which one of the following is correct statement:

Form the pair of linear equations In the following problems and find their solutions (if they exist) by any algebraic method. :- Places A and B are 100 km apart on a highway. One car starts from A and another from B at the same time. If the cars travel in the same direction at different speeds they meet in 5 hours. If they travel towards each other, they meet in 1 hour. What are the speeds of the two cars ?

From the pair of linear equations in the following problems and find their solutions (if they exist) by elimination method : Points A and B are 90 km apart from each other on a highway. A car starts from A and another from B at the same time. If they go in the same direction they meet in 9 hours and if they go in opposite direction they meet in 9/7 hours. Find their speeds.

Which of the following statements regarding species interpendence are ture? an interspecific association where one is benefitted and other remains unaffected is called mutualism An interspecific association where both partners device benefit from each other is called commensalism A direct food relation between the two species of animals in whihc one animal kills and feeds on another animals called predation An interspecific relationship where both the partners are benefitted from each other is called symbiosis.

In these question, a statement of assertion followed by a statement of reason is given .Choose the correct answer out of the following choices: Assertion and reason both are correct statements and reason is correct explanation for assertion. Assertion and reason both are correct statements but reason is not correct explanation for assertion. Assertion is correct statement but reason is wrong statement. Assertion is wrong statement but reason is correct statement. Assertion: the frequencies of incident ,reflected and refracted beam of monochromatic light incident from one medium to another are same. Reason: The incident, reflected and refracted rays are coplanar.