SC's Question number - 741 , 742

741). The energy source on Voyager 2 is not a nuclear reactor, in which atoms are actively broken apart; rather a kind of nuclear battery that uses natural radioactive decay to produce power.

(A) apart; rather

(B) apart, but rather

(C) apart, but rather that of

(D) apart, but that of

(E) apart; it is that of


742). The evolution of the technology of microelectronics over the past decade has been so rapid that it is sometimes called a revolution.

(A) has been so rapid that it is sometimes

(B) has been rapid enough sometimes to be

(C) has been rapid enough it is sometimes

(D) is so rapid it has sometimes been

(E) is so rapid that it is sometimes

Answers:

741). (OG 10th Ques no - 172) - OA - B

OE: Choice B, the best answer, follows an idiomatic form of expression for paired coordinates--not X, but rather Y; here rather is optional but preferable because it helps establish a contrast between the two types of energy source.

A - incorrect - incorrectly uses a semicolon rather than a coordinating conjunction (but) to connect the coordinate parts; a semicolon should be used to join independent clauses (http://gmat-grammar.blogspot.com/search/label/Semicolon)

C, D, E - incorrect - that of has no grammatical referent and thus produces illogical and incorrect sentences

742). OA - A - idiomatic - ..so X that Y..

B, C - incorrect - awkward - ....rapid enough ...sometimes..to be

D, E - incorrect - wrong tense

SC's Question number - 851 , 852

851). The work of mathematician Roger Penrose in the early 1970s, on the geometry of what are called aperiodic tiles, turned out to describe the architecture of a previously unknown class of crystals.

(A) what are called aperiodic tiles, turned out to describe

(B) what is called aperiodic tiles, describes

(C) aperiodic tiles, describing

(D) so-called aperiodic tiles, describe

(E) aperiodic tiles, it turned out to describe

852). There are more than forty newspapers published in the cities of Kerala, a state on the Malabar Coast, which reflects the fact that Keralans are by far India’s most literate citizens.

(A) which reflects

(B) and that number reflects

(C) which reflect

(D) that number reflects

(E) that reflects

Answers:

851). OA - A

B - incorrect - ...tiles(plural)...describes(singular) - what + verb + subject ..in such constructions generally the number of verb is governed by the subject

C - incorrect - sentence fragment - The work.....describing

D - incorrect - subject verb agreement - here The work(singular subject)....describe(plural verb)

E - incorrect - ambiguous it - it can refer to work or geometry


852). OA - B - correct - and is required to join two independent clauses here

SC's Question number - 881 , 882

881). Two week notice being given to employers before leaving a job is the generally accepted protocol.

(A) Two week notice being given to employers before leaving

(B) Giving notice to employers of two weeks before having to leave

(C) Two week's notice to give to employers before leaving

(D) Giving notice to employers two weeks before leaving

(E) To give two weeks' worth of notice before having to leave



882). Under a provision of the Constitution that was never applied, Congress has been required to call a convention for considering possible amendments to the document when formally asked to do it by the legislatures of two-thirds of the states.

(A) was never applied, Congress has been required to call a convention for considering possible amendments to the document when formally asked to do it

(B) was never applied, there has been a requirement that Congress call a convention for consideration of possible amendments to the document when asked to do it formally

(C) was never applied, whereby Congress is required to call a convention for considering possible amendments to the document when asked to do it formally

(D) has never been applied, whereby Congress is required to call a convention to consider possible amendments to the document when formally asked to do so

(E) has never been applied, Congress is required to call a convention to consider possible amendments to the document when formally asked to do so


Answers:

881). OA - D

A, C - incorrect - says two weeks notice itself is a protocol

B - incorrect - misplaced modifier - two weeks should modify notice

E - incorrect - two weeks notice is more concise than two weeks' worth of notice

882). (OG 10th Ques No - 41) - OA - E
OE: Choices A, B, C, and D contain tense errors (the use of was never applied with has been required in A, for example), unidiomatic expressions (call... for considering), and uses of a pronoun (it) with no noun referent. By introducing the subordinating conjunction whereby, C and D produce sentence fragments. Only E, the best choice, corrects all of these problems. The predicate has never been applied refers to a span of time, from the writing of the Constitution to the present, rather than to a past event (as was does), and the phrase is required
indicates that the provision still applies. The phrase call... to consider is idiomatic, and to do so can substitute grammatically for it.

SC's Question number - 925, 926

925). Where once the union had acquiesced to the prejudices of its English-speaking members by supporting the imposition of an alien tax on immigrant workers, after 1897 the United Mine Workers made a determined effort to enlist Italians and Slavs in its ranks.

(A) Where once the union had acquiesced to the prejudices of its English-speaking members by supporting

(B) Where once the union acquiesced to it English-speaking members' prejudice for the support of

(C) While once the union had acquiesced to the prejudices of its English-speaking members in support of

(D) While once the union acquiesced to its English-speaking members' prejudice in supporting

(E) While once the union had acquiesced to the prejudices of its English-speaking members in its supporting of

926). While all states face similar industrial waste problems, the predominating industries and regulatory environment of the states obviously determines the types and amounts of waste produced, as well as the cost of disposal.

(A) all states face similar industrial waste problems, the predominating industries and regulatory environment of the states obviously determines

(B) each state faces a similar industrial waste problem, their predominant industries and regulatory environment obviously determine

(C) all states face a similar industrial waste problem, their predominating industries and regulatory environment obviously determines

(D) each state faces similar industrial waste problems, the predominant industries and regulatory environment of each state obviously determines

(E) all states face similar industrial waste problems, the predominant industries and the regulatory environment of each state obviously determine

Answers --

925). OA - A

B - incorrect - changes the meaning of the sentence - illogically suggests that imposition of an alien tax was the reason why the union acknowledged the prejudice of its english-speaking members.

C, D, E - incorrect - use of while wrong

926). OA - E

OE - This sentence requires careful attention to number and agreement. The main clause has a compound subject, the predominating industries and the regulatory environment, which must take a plural verb, determine, rather than the singular verb shown in the original sentence. The sentence begins with the conjunction while, here used to mean although, and contrasts the similar situation of all states with the varying conditions of each state. The regulatory environment is singular and must logically be completed by of each state rather than of the states; the point of the main clause is that all states do not share the same predominating industries and regulatory environment.

A - incorrect - The compound subject does not agree with the singular verb determines; main clause should call attention to conditions of each state, not the states

B - incorrect -Each state must be compared to all other states; their does not agree with each

C - incorrect - Using a semicolon results in a sentence fragment; subject and verb do not agree

D - incorrect - Each state must be compared to all other states; subject and verb do not agree

NOTE: Like while, where can be used in the same way as whereas. But between while and whereas, one should go with whereas (or where in this case) if while can be ambiguous in the sentence, since it can mean whereas or at the same time that .

e.g - Ram prefers to drink coffee at cafe coffee day while Shyam drinks coffee at Barista.